I was making a 2048 game on Code::Blocks, but due to debugging problems, I move to Visual Studio Community 2017. It seems that conio.h doesn't work there, so I'm trying to switch to curses.h library.
I've read a lot of tutorials, but none of them worked for me. I visited their website and downloaded the .zip file with 384 kilobytes (KB), but I do not know what to do with these files.
Help, please?
I have found a very useful website which talks about PDCurses and its installation in Visual Studio. Even though it is for 2010/2013, it really worked for me in VS2017 — even the demo programs (with very minute changes)!
So here is the steps I did (since you already have PDCurses):
Take the developer command prompt of VS2017 community edition and type
in set PDCURSES_SRCDIR=<PDCurses Directory Location>; in my case it
was
set PDCURSES_SRCDIR=C:\pdcurses-master
Note: Here we are setting up the environment variable needed for compilation. If you need additional functionality defined by the pdcurses library, you may want to set corresponding variables in this step. For example, if you need wide character support, you can use set WIDE=1. To see what all are the options available, you can open up the make file (mentioned in next step) in any text editor and look for if conditionals.
Navigate in the command window to the directory of PDCurses/win32 (in my case C:\pdcurses-master\win32)
nmake –f vcwin32.mak
(This is the make file for PDCurses.) It will create the pdcurses.lib for our Visual Studio.
Now we need to incorporate the generated library into our project. So open up your project and go to project properties
In “VC++ Directories”, change:
Include directories: Add a new file-path to PDCurses installation directory, in my case it is C:\pdcurses-master.
Library directories: Add a new file-path to PDCurses installation library directory, in my case it is C:\pdcurses-master\win32.
In C/C++:
In “Code Generation” tab, change “Runtime Library” to “Multithreaded Debug (/MTd)”. (Usually, it is set already)
In Linker:
In “Input” tab, add pdcurses.lib to Additional Dependencies (I initially got confused - remember, it is the input tab of linker)
Click on Apply, and OK.
Then wow! I ran some sample programs (demos) from the pdcurses project and all of them worked for me with very slight modifications.
Note: I created a Windows (also known as Win32, as in Win32 API) console application with Visual Studio 2017 and loaded the project. I did include stdafx.h and compilation was successful and I was able to see the output in the terminal window.
The above website also provides a PDF document too. The instruction there starts from the downloading the pdcurses from website.
This is old news now, but it might help somebody to know that pdcurses is packaged up on vcpkg.
To use it, (assuming you have vcpkg installed, of course, (Installing vcpkg) )
vcpkg install pdcurses
and you're off to the races. vcpkg will take care of making sure the include and library paths are all set.
Related
I started working as a research fellow at my university and was instructed to develop a component for an already existing application written in C++ using an in-house framework, also developed in C++.
Currently I am struggling with properly setting up the project in Visual Studio 2017.
Whenever I try to include a file from the framework, IntelliSense complains about not being able to open the file.
However, following things add to the oddness of the problem:
The solutions properties are set correctly; the project DOES build without any complaints.
Writing the '#include'-directive, IntelliSense DOES suggest the correct relative path to the header files (i.e. #include <framework/class.h>).
I can open the header file from within the source file referencing it, using the 'Open Document "class.h"' dialog.
I have already came across this:
IntelliSense: Cannot open source file in include path
Intellisense cannot open source file "*.h"
So far, nothing solved my issue. Did someone come across this issue yet?
TL;DR
Everything compiles fine.
"C/C++ -> General -> Additional Include Directories" is set properly.
"VC++ Directories -> Include Directories" is set as well.
IntelliSense properly suggests header file, when writing include directive.
BUT IntelliSense reportedly fails to open the file, thus not indexing it.
I am stuck with a fancy but resource hungry text editor.
EDIT:
I am working on a MacBook "13 2016; installed Windows 10 Pro 64-bit via Bootcamp.
This issue occurs because Windows now has the option for making folders case-sensitive and intellisense has a habit of changing the case of files that it tries to open.
Intellisense tries to use a path like C:\WORKSPACEPATH\PROJECTDIR\MYFILE.cpp (i.e. all uppercase), but if C:\workspace (or any of the other directories in the path) are set to be case-sensitive and don't exactly match, it won't be found.
In my case it was because I created the folder via WSL which enables case sensitivity by default on any new directories it creates (including via things like git clone). See here
Easy Fix
This can be fixed by running the following:
fsutil file setCaseSensitiveInfo <directory> disable
More Commands
You can check whether a folder has case sensitivity enabled by running
fsutil file queryCaseSensitiveInfo <directory>
and Finally, a handy one-liner to disable this recursively:
for /r /d %f in (.) do (fsutil file setCaseSensitiveInfo %f disable)
(This info was originally posted as a comment to the original question, before it turned out it was in fact the same problem. See the comments for input from a couple of other people)
For a Linux project open in Visual Studio 2022, I tried the accepted answer from #yothsoggoth, , which makes sense to me, but unfortunately didn't work.
I realized that visual studio couldn't even open the C++ file from the standard library using F12 but it could open others from other libraries.
So in my case the solution was to close visual studio, backup the folder working as a cache.
C:\Users\[user]\AppData\Local\Microsoft\Linux to C:\Users\[user]\AppData\Local\Microsoft\Linux.bak
Then I reopened Visual Studio and let CMake to regenerate the cache.
The errors now are gone and I can now even open <string> and others from the C++ std library with F12.
I hope this workaround helps others
I have many Qt projects in Visual Studio, using the new Qt/MsBuild format provided by the Qt VS Tools. When compiling in my development environment, where I have the Qt VS Tools installed, everything works flawlessly (compiling from IDE and from command line).
We have a computer dedicated to nightly builds, where only the compiler and msbuild are available (no IDE nor Qt VS Tools are installed).
When compiling the projects in such computer we get an error:
QtMsBuild: could not locate qt.targets, qt.props; project may not build correctly.
Followed by several lines such as
e:********\Preferences.h(4): fatal error C1083: Cannot open include file: 'ui_Preferences.h': No such file or directory
(Project contains Preferences.ui).
How can I solve such errors when Qt VS Tools are not installed?
One solution provided by the Tools' creators is to copy %LOCALAPPDATA%\QtMsBuild into each project directory. But we are talking about hundred of projects. Doing manually, and more on, pushing them as part of the project itself doesn't sound very elegant.
One option would be to add a pre-build step that copies it from a common place into each project (and adding a **/QtMsBuild line to each .gitignore file). Again, looks like too much work.
When looking at the .vcxproj file for the Qt project you find this fragment (the reason for the solution provided by creators):
<PropertyGroup Condition="'$(QtMsBuild)'=='' or !Exists('$(QtMsBuild)\qt.targets')">
<QtMsBuild>$(MSBuildProjectDirectory)\QtMsBuild</QtMsBuild>
</PropertyGroup>
So, the simplest solution (without being able to install the tools), is to copy the %LOCALAPPDATA\QtMsBuild directory (from a system with the Tools installed) into the night computer (in any common place, but I decided to keep the location used by the tools) and then setting an environment variable:
set QtMsBuild=%LOCALAPPDATA%\QtMsBuild
PS: do not add double quotes to the variable (at least I had problems with them, so VS couldn't find the files).
Update 9-14-2020
I'm not sure on which version it started, but Qt projects created with (at least) the v2.5.2 Qt VS Tools fails to compile indicating that the Qt version has not been set. To solve so, you can
Copy the Registry entries from a computer with tools installed, located at HKCU\SOFTWARE\Digia\Versions.
If you will rely on a single Qt version (but that may be update globally for all projects), you can skip the Registry and just set the Qt version of all projects to $(DefaultQtVersion) (the same used in past project formats) and define an environment variable pointing to the directory of the version: set DefaultQtVersion=c:\Qt\Qt_5_15_0\Win32, for example.
I had problems in my case setting up $Env:QtToolsPath="$Env:QT_PATH\bin" fixed the problem. (It was not finding qmake for some checks). This, I think, is required when using QtMsBuild v3.3
Not sure if this info is 100% correct but may help someone.
For me to use MsBuild with Qt using QtMsBuild (not installing Visual Studio and/or VS plugins), I need to set up:
Example (PowerShell):
- $Env:PATH="$Env:MSBUILD_PATH;$Env:PATH"
- $Env:QT_PATH="D:\BuildTools\Qt\5.15.1\msvc2019_64"
- $Env:QtMsBuild="D:\BuildTools\Qt\QtMsBuild303" #303 Against visual studio project version
- $Env:QtToolsPath="$Env:QT_PATH\bin" #Support QtMSBuild , At desktop is done by the plug in
- $Env:PATH="$Env:QtMsBuild;$Env:PATH"
- $Env:PATH="$Env:QT_PATH\bin;$Env:PATH"
I hit this and got it working.
I followed #cbuchart 's advice; but needed to do a little more/different.
So here is what I did. I copied %LOCALAPPDATA%\QtMsBuild to my repo. I then edited my .vcxproj with a text editor. I adjusted the line that looks like:
<QtMsBuild Condition="'$(QtMsBuild)'=='' OR !Exists('$(QtMsBuild)\qt.targets')">$(MSBuildProjectDirectory)\QtMsBuild</QtMsBuild>
To be:
<QtMsBuild Condition="'$(QtMsBuild)'=='' OR !Exists('$(QtMsBuild)\qt.targets')">$(MSBuildProjectDirectory)\..\QtMsBuild</QtMsBuild>
Depending on the relative location of where your project(s) are to the copied QtMsBuild directory you might want to adjust this. In my case the .vcxproj was in a directory one level from the directory that contains the QtMsBuild directory I copied.
Next in the QtMsBuild/Qt.props file I added the following:
<PropertyGroup>
<DefaultQtVersion>$(MSBuildThisFileDirectory)\..\Qt5.15.0\msvc2019_64</DefaultQtVersion>
<QtToolsPath>$(DefaultQtVersion)\bin</QtToolsPath>
</PropertyGroup>
That was added right after the opening Project tag in that file.
This was as #cbuchart mentioned something might have changed. I didn't do the Registry idea; but added those lines instead. I think it is possible to add them to a different file that gets imported before Qt.props if desired.
Now as for what this "Qt5.15.0\msvc2019_64" is; you'll need the tools, includes, libraries from a computer with Qt installed in order to build (also DLLs if your build needs to run the executable (i.e. tests)). This might be a lot of files so you can reduce it some if you know what you are doing. It might make sense to have these be put into it's own submodule or something.
After that it should uic/moc files and ultimately build (and run).
I got too. Maybe you need update your visual studio and then restart your computer ...
problem solved. reason: install 'qt vs tools' latest version but the visual studio
not support of it.
I am trying just a basic program with OpenCV with the following code:
#include "cv.h"
#include "highgui.h"
int main()
{
IplImage* newImg;
newImg = cvLoadImage("~/apple.bmp", 1);
cvNamedWindow("Window", 1);
cvShowImage("Window", newImg);
cvWaitKey(0);
cvDestroyWindow("Window");
cvReleaseImage(&newImg);
return 0;
}
When I run this, I get
The program can't start because
libcxcore200.dll is missing from your
computer. Try reinstalling the
program to fix this problem.
However, I can see this DLL. It exists. I have added the following to the input dependencies for my linker
C:\OpenCV2.0\lib\libcv200.dll.a
C:\OpenCV2.0\lib\libcvaux200.dll.a
C:\OpenCV2.0\lib\libcxcore200.dll.a
C:\OpenCV2.0\lib\libhighgui200.dll.a
What gives? I'm using visual studio 2008.
When I link the .dll files instead of .dll.a files, I get
fatal error LNK1107:invalid or corrupt
file: cannot read at 0x3F8
libcv200.dll
I followed instructions on http://opencv.willowgarage.com/wiki/VisualC%2B%2B_VS2010 but was still stuck on exactly the same problem, so here's how I resolved it.
Fetched MSVC 2010 express edition.
Fetched Win 32 OpenCV 2.2 binaries and installed in default location.
Created new project.
Project setup
Project -> OpenCV_Helloworld Properties...Configuration Properties -> VC++ Directories
Include Directories... add: C:\OpenCV2.2\include\;
Library Directories... add: C:\OpenCV2.2\lib;C:\OpenCV2.2\bin;
Source Directories... add:
C:\OpenCV2.2\modules\calib3d\src;C:\OpenCV2.2\modules\contrib\src;C:\OpenCV2.2\modules\core\src;C:\OpenCV2.2\modules\features2d\src;C:\OpenCV2.2\modules\flann\src;C:\OpenCV2.2\modules\gpu\src;C:\OpenCV2.2\modules\gpu\src;C:\OpenCV2.2\modules\highgui\src;C:\OpenCV2.2\modules\imgproc\src;C:\OpenCV2.2\modules\legacy\src;C:\OpenCV2.2\modules\ml\src;C:\OpenCV2.2\modules\objdetect\src;C:\OpenCV2.2\modules\video\src;
Linker -> Input -> Additional Dependencies...
For Debug Builds... add:
opencv_calib3d220d.lib;opencv_contrib220d.lib;opencv_core220d.lib;opencv_features2d220d.lib;opencv_ffmpeg220d.lib;opencv_flann220d.lib;opencv_gpu220d.lib;opencv_highgui220d.lib;opencv_imgproc220d.lib;opencv_legacy220d.lib;opencv_ml220d.lib;opencv_objdetect220d.lib;opencv_video220d.lib;
At this point I thought I was done, but ran into the problem you described when running the exe in debug mode. The final step is obvious once you see it, select:
Linker -> General ... Set 'Use Library Dependency Inputs' to 'Yes'
Hope this helps.
Just add C:\OpenCV2.0\bin into your PATH environment variable
or
When you install OpenCV,
Choose the option, Add OpenCV to the system PATH for current user which is not default one
Just for your information,after add the "PATH",for my win7 i need to reboot it to get it work.
In Visual Studio 2013 you need to add this to the Environment Variables and then Restart your pc. This is the path where .dll file located in.
I have had numerous problems with opencv and only succeded after a gruesome 4-6 months. This is the last problem I have had, but all of the above didn't work. What worked for me was just copying and pasting the opencv_core2*.dll (and opencv_highgui2*.dll which it will ask for since you included this as well) into the release (or debug folder - I'm assuming. Haven't tested this) folder of your project, where your application file is.
Hope this helps!
You just need to add the folder of the needed dll file (or files) to your system "Environment Variables" in "Path".
Your problem will 100% be resolved. I had this problem too.
just open the bin folder and copy and paste the .dll files to the folder you are working in..it should fix the problem
As to #Marc's answer, I don't think VC uses the path from the OS. Did you add the path to VC's library paths. I usually add the DLLs to the project and copy if newer on the build and that works very well for me.
you can find the opencv_core248 and other dlls in opencv\build\x86\vc12\bin folder. Just copy the dlls you require into system32 folder. And your app should start working in a flash ! Hope it helps.
This might be like resurrecting a dead horse. But just so it's out there, the reason why the answer to these types of questions to simply put dll's into the system32 folder is because that folder is in the os's system path.
It's actually best practice to provide the os with a path link.
With windows 10
open up file explorer
right click on "this pc" and select "properties"
Now in the "Control Panel\System and Security\System" window that comes up, click on "Advanced System Settings" from the left hand panel.
At the bottom of the next window, click on the "Environment Variables" button.
On the next window, there are two panels, the top one is for modifying variables to the current user, and the bottom panel is for modifying variables to the system. On the bottom panel, find the variable "Path" and click it to select it, then click on the "edit" button.
Here you can then create, edit, delete, or update the different paths for the system. For example, to add mingw32-make to the system so you can access that command via command prompt, click new, then paste in the path to the bin. Example path, "D:\Qt\Tools\mingw730_64\bin", no quotation marks nor additional whitespaces.
Click ok on all the windows so that the changes are saved, then reboot your computer for the changes to be loaded.
The ".a" at the end of your DLL files is a problem, and those are there because you didn't use CMAKE to build OpenCV 2.0. Additionally you do not link to the DLL files, you link to the library files, and again, the reason you do not see the correct library files is because you didn't use CMAKE to build OpenCV 2.0. If you want to use OpenCV 2.0 you must build it for it to work correctly in Visual Studio. If you do not want to build it then I would suggest downgrading to OpenCV 1.1pre, it comes pre-built and is much more forgiving in Visual Studio.
Another option (and the one I would recommend) is to abandon OpenCV and go with EmguCV. I have been playing with OpenCV for about a year and things got much easier when I switched to EmguCV because EmguCV works with .NET, so you can use a language like C# that does not come with all the C++ baggage of pointers, header files, and memory allocation problem.
And as for the question of 64bit vs. 32bit, OpenCV does not officially support 64bit. To be on the safe side open your project properties and change the "Platform Target" under the "Build" tab from "Any CPU" to "X86". This should be done any time you do anything with OpenCV, even if you are using a wrapper like EmguCV.
Copy all .dll from /bin in System32
Just copy the .dll files to C:\windows\system32\
No need to do any of that. It is a visual studio error.
just go here:
http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=31354
and download the appropriate fix for your computer's OS
close visual studio, run the fix and then restart VS
The code should run without any error.
I have downloaded c++ open source application which was created using under Linux IDE/Editor (or maybe something NOT Windows) and its no longer supported.
This time I want to edit and recompile it using VS 2010.
Error(s) left (mostly prefixed with "wx") such as:
"wxString is undefined"
"wxStaticText expected a type specifier"
etc... makes me think that this is all about wxWidgets.
After successfully building wxWidgets, what to do next to integrate it to the actual c++ program for me to be able to edit and compile using VS 2010?
I use BorlandC++ last 2 years ago but not familiar with GUI packages.
The first step is to tell the compiler where to look for the wxWidgets include files.
So, you need to find out where these files are, which depends on where you installed and built wxWidgets.
On my system, this is C:\Program Files (x86)\wxWidgets-2.8.12
I consider the best way is to, instead of hard-coding the path in every project, create an environment variable WXROOT to store the path to your wxWidgets folder.
Control Panel | System | Advanced | Environment variables
Now you have to tell the compiler about this
Visual Studio | Project | Properties | C/C++ | Additional Include Directories
What you add here depends on what kind of build you are doing. If you are doing a unicode release build, then this will be a good start
"$(WXROOT)\lib\vc_lib\mswu";"$(WXROOT)\include"
Now you should have fixed your compiler errors.
Next you will get some linker errors ....
Maybe the errors are caused because you are using wxwidget 2.8 which is unsupported in VS 2010.
Try building wxwidgets 2.9 or use VS 2008. I had no problem building wxwidgets 2.9 on VS 2010.
Wxwidgets site home says "While this is still officially a development release because some API details are still not frozen, we believe that 2.9.3 can be used in production environment".
About what to do after successfully build it, take a look at this http://wiki.wxwidgets.org/Microsoft_Visual_C%2B%2B_Guide
You may want to use the tutorial of the section "Creating a new project from a sample" 'cause creating a project by hand is a little bit complicated as wxwidgets requires some extra configuration and not just to set and include and libs dir as most of the libs does.
Here is a video which shows how to start with Visual Studio.
Also you can take a look at samples directory and create your own project based on configuration of projects from that directory.
May be I am little bit late , But this will help newcomers to wxwidgets.
First of all Goto Wxwidgets directory(to download path) in my case it is "C:\Users\WxWidgets_all".
Now in that folder goto build directory.Now open Visual Studio Command prompt. If you have already installed Visual Studio then you can easily find it through start menu.
Now in command prompt go upto <Path to your wxWidgets>/build/msw/ . Now run Following Commands.
nmake /f makefile.vc--For Static Library and Debug Version
nmake /f makefile.vc SHARED=1--For SHARED Library and Debug Version
nmake /f makefile.vc BUILD=release--For SHARED Library and Release Version
After completing it , you will have dll or lib in "<path to wxwidgets>\lib\" depending on option provided in above commands.
Now include all files related to wxwidgets in your project.Mainly two paths are required to include "<path to wxwidgets>\inlcude\" and "<path to wxwidgets>\lib\vc_<lib\dll>".
After that link your wxwidgets generated library to your project.To do this inlcude "<path to wxwidgets>\lib\vc_<lib\dll>" to your project property in library section.
Now add below preprocessors to your project.
_WINDOWS
NDEBUG(For Release)
_DEBUG(For Debug)
_CRT_SECURE_NO_DEPRECATE=1
_CRT_NON_CONFORMING_SWPRINTFS=1
_SCL_SECURE_NO_WARNINGS=1
__WXMSW__
_UNICODE
After that add following library to your project from "<path to wxwidgets>\lib\vc_<lib\dll>"
wxbase30u_net
wxmsw30u_core
wxbase30u
wxtiff
wxjpeg
wxpng
wxzlib
wxregexu
wxexpat
wxmsw30u_adv
Based on your compiled options , library name can be little bit different.
I think I have covered all the steps to run wxWidgets.
Even if you got errors , You can check minimal project in "<path to wxwidgets>\samples"
directory. Try to run that project , and even if you got error then your wxwidgets is not built properly.
Hope this will help.
I am trying just a basic program with OpenCV with the following code:
#include "cv.h"
#include "highgui.h"
int main()
{
IplImage* newImg;
newImg = cvLoadImage("~/apple.bmp", 1);
cvNamedWindow("Window", 1);
cvShowImage("Window", newImg);
cvWaitKey(0);
cvDestroyWindow("Window");
cvReleaseImage(&newImg);
return 0;
}
When I run this, I get
The program can't start because
libcxcore200.dll is missing from your
computer. Try reinstalling the
program to fix this problem.
However, I can see this DLL. It exists. I have added the following to the input dependencies for my linker
C:\OpenCV2.0\lib\libcv200.dll.a
C:\OpenCV2.0\lib\libcvaux200.dll.a
C:\OpenCV2.0\lib\libcxcore200.dll.a
C:\OpenCV2.0\lib\libhighgui200.dll.a
What gives? I'm using visual studio 2008.
When I link the .dll files instead of .dll.a files, I get
fatal error LNK1107:invalid or corrupt
file: cannot read at 0x3F8
libcv200.dll
I followed instructions on http://opencv.willowgarage.com/wiki/VisualC%2B%2B_VS2010 but was still stuck on exactly the same problem, so here's how I resolved it.
Fetched MSVC 2010 express edition.
Fetched Win 32 OpenCV 2.2 binaries and installed in default location.
Created new project.
Project setup
Project -> OpenCV_Helloworld Properties...Configuration Properties -> VC++ Directories
Include Directories... add: C:\OpenCV2.2\include\;
Library Directories... add: C:\OpenCV2.2\lib;C:\OpenCV2.2\bin;
Source Directories... add:
C:\OpenCV2.2\modules\calib3d\src;C:\OpenCV2.2\modules\contrib\src;C:\OpenCV2.2\modules\core\src;C:\OpenCV2.2\modules\features2d\src;C:\OpenCV2.2\modules\flann\src;C:\OpenCV2.2\modules\gpu\src;C:\OpenCV2.2\modules\gpu\src;C:\OpenCV2.2\modules\highgui\src;C:\OpenCV2.2\modules\imgproc\src;C:\OpenCV2.2\modules\legacy\src;C:\OpenCV2.2\modules\ml\src;C:\OpenCV2.2\modules\objdetect\src;C:\OpenCV2.2\modules\video\src;
Linker -> Input -> Additional Dependencies...
For Debug Builds... add:
opencv_calib3d220d.lib;opencv_contrib220d.lib;opencv_core220d.lib;opencv_features2d220d.lib;opencv_ffmpeg220d.lib;opencv_flann220d.lib;opencv_gpu220d.lib;opencv_highgui220d.lib;opencv_imgproc220d.lib;opencv_legacy220d.lib;opencv_ml220d.lib;opencv_objdetect220d.lib;opencv_video220d.lib;
At this point I thought I was done, but ran into the problem you described when running the exe in debug mode. The final step is obvious once you see it, select:
Linker -> General ... Set 'Use Library Dependency Inputs' to 'Yes'
Hope this helps.
Just add C:\OpenCV2.0\bin into your PATH environment variable
or
When you install OpenCV,
Choose the option, Add OpenCV to the system PATH for current user which is not default one
Just for your information,after add the "PATH",for my win7 i need to reboot it to get it work.
In Visual Studio 2013 you need to add this to the Environment Variables and then Restart your pc. This is the path where .dll file located in.
I have had numerous problems with opencv and only succeded after a gruesome 4-6 months. This is the last problem I have had, but all of the above didn't work. What worked for me was just copying and pasting the opencv_core2*.dll (and opencv_highgui2*.dll which it will ask for since you included this as well) into the release (or debug folder - I'm assuming. Haven't tested this) folder of your project, where your application file is.
Hope this helps!
You just need to add the folder of the needed dll file (or files) to your system "Environment Variables" in "Path".
Your problem will 100% be resolved. I had this problem too.
just open the bin folder and copy and paste the .dll files to the folder you are working in..it should fix the problem
As to #Marc's answer, I don't think VC uses the path from the OS. Did you add the path to VC's library paths. I usually add the DLLs to the project and copy if newer on the build and that works very well for me.
you can find the opencv_core248 and other dlls in opencv\build\x86\vc12\bin folder. Just copy the dlls you require into system32 folder. And your app should start working in a flash ! Hope it helps.
This might be like resurrecting a dead horse. But just so it's out there, the reason why the answer to these types of questions to simply put dll's into the system32 folder is because that folder is in the os's system path.
It's actually best practice to provide the os with a path link.
With windows 10
open up file explorer
right click on "this pc" and select "properties"
Now in the "Control Panel\System and Security\System" window that comes up, click on "Advanced System Settings" from the left hand panel.
At the bottom of the next window, click on the "Environment Variables" button.
On the next window, there are two panels, the top one is for modifying variables to the current user, and the bottom panel is for modifying variables to the system. On the bottom panel, find the variable "Path" and click it to select it, then click on the "edit" button.
Here you can then create, edit, delete, or update the different paths for the system. For example, to add mingw32-make to the system so you can access that command via command prompt, click new, then paste in the path to the bin. Example path, "D:\Qt\Tools\mingw730_64\bin", no quotation marks nor additional whitespaces.
Click ok on all the windows so that the changes are saved, then reboot your computer for the changes to be loaded.
The ".a" at the end of your DLL files is a problem, and those are there because you didn't use CMAKE to build OpenCV 2.0. Additionally you do not link to the DLL files, you link to the library files, and again, the reason you do not see the correct library files is because you didn't use CMAKE to build OpenCV 2.0. If you want to use OpenCV 2.0 you must build it for it to work correctly in Visual Studio. If you do not want to build it then I would suggest downgrading to OpenCV 1.1pre, it comes pre-built and is much more forgiving in Visual Studio.
Another option (and the one I would recommend) is to abandon OpenCV and go with EmguCV. I have been playing with OpenCV for about a year and things got much easier when I switched to EmguCV because EmguCV works with .NET, so you can use a language like C# that does not come with all the C++ baggage of pointers, header files, and memory allocation problem.
And as for the question of 64bit vs. 32bit, OpenCV does not officially support 64bit. To be on the safe side open your project properties and change the "Platform Target" under the "Build" tab from "Any CPU" to "X86". This should be done any time you do anything with OpenCV, even if you are using a wrapper like EmguCV.
Copy all .dll from /bin in System32
Just copy the .dll files to C:\windows\system32\
No need to do any of that. It is a visual studio error.
just go here:
http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=31354
and download the appropriate fix for your computer's OS
close visual studio, run the fix and then restart VS
The code should run without any error.