As title says. I'm adding a project to an existing open source solution and would like to use some of the functionality of its .exe tools in my project. I added it as a reference and added its directory to additional includes but I cant seem to include its header file.
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Being new to making/using libraries, I followed a simple tutorial to build a static library in Visual Studio (2022). I made a solution with 2 projects in it. One that builds a library and one that uses the library. It worked. Then I made an independent project / solution to see if I can use this library independently from the original solution/projects. I put the lib file and hpp/cpp file into new separate folders and set these folders in project properties (Additional Include and Library Directories + the .lib file).
Problem: I could use the functions from the library in this new project but when I tried to step into it with the debugger, the cpp file it stepped into was from the original project. (that's what the path showed anyway.) When I renamed the old project and tried again, VS complained that the file directory has changed and asked me to set the path to it. I did set it to the newly made directory with only the hpp/cpp in it and it was fine. I made another new project for using the library and tried the whole thing again and then the debugger simply could not step into the function, it stepped over it.
My questions: what was going on here? how did the debugger find the original cpp file when Im positive I did not set that path anywhere in the new project? and how do I debug a static library then? Is putting the cpp file next to the header in the include directory not enough?
I have a Visual Studio C+++ project, and in the project I have some header files I want to get via the include directories setting on the project properties.
As far as I know that's all set up correctly. I've added the folder path which contains the files and the 3 files appear in the external dependencies folder under my project in Visual Studio.
The problem is that:
when I write the include "xyz.h" for one of the three files, I get "can not find file blah blah" error. This only occurs for one of the three. The other two work fine and I can include them just fine. They are all just basic headers.
Does anyone have any idea why one of my files would fail to work. Thanks
When you setting up the project properties such ad additional include directories, make sure to select "All configurations" in the project properties window. look at the image.
Sorry, the problem was that the file was being used by some background process, so the dll that I was trying to load couldn't open the file.
I have been trying linking of a .lib file and also including a header file in my C++ console application project. I copied the C++ header file from one of my other projects, and pasted it under Header Files folder in console application project. Here's the screenshot to see: http://i.imgur.com/JFFIn.png
However, when I try to include the header in my code as #include..., I do not get an intellisense with my header file's name. (I only see targetver.h, stdafx.h and Debug folder)
I tried to point Add additional include directories in my C++ console application project properties to the Project folder itself, but that doesn't seem to help and the file still doesn't show up.
If I write the name of the header file as #include "DllTest.h", I get an error saying: Cannot open include file: 'DLLTest.h': No such file or directory c:\users\ht\documents\visual studio 2010\projects\dlltest\dlltestconsole\dlltestconsole.cpp
How is the header file included in here, so that it starts appearing? If I add a new item > Header File, name it to DLLTest.h and copy paste the header files content here, it just shows up normally. How will the header file which is copied - pasted into Header Files folder show up in the code?
In C++ projects, the things that look like folders in the Solution Explorer aren't actually folders, they are filters. They are UI-only entities that can be used to organize project items in the IDE. They do not in any way reflect the structure or location of items on disk, though. You can add a file from any location on disk to any filter in the solution.
The compiler knows nothing of these filters; it only knows about files as they exist on disk.
In your case, the files are not located in your project folder. You'll either need to:
copy your files into your project folder, then add them to the project from there (right-click on the solution then Add Existing Item), or
add the files from where they are, then add their location to the "Additional Include Directories" property in the project properties.
I do not know of any way to have the IDE automatically move files to the project directory when you copy and paste them into the project. The C++ project system is fundamentally different from the project system used for C# and VB.
I've got a relatively simple setup in Visual Studio 2010- a main application and a DLL it depends on. I have a header that defines it's interface- how can I set up the header to be included in both projects? They are both in the same solution.
See my answer to this question, but its just that you are using a dynamic library.
In summary, the main application project should reference the DLL project for the purposes of linking, and the main project should include folder references so the compiler can access header files.
In the VC different projects are placed in a different subdirectories of the solution dir.
If you want include files from the other project, you need to explicitly add it's dir to the include search path:
right click on the ".exe" project in the solution explorer. Choose properties.
In the property window go to the "C/C++" section.
There is the "Additional Include Directories" property. Add your "dll" project directory there.
I have had C++ experience but not MSVC.
What I am trying to do is incorporate a .dll from an open source project into my project. The code is available and I have built it. I have the .dll as well as the .lib which as I understand it is required for C++ projects.
Now unfortunately there is no simple "Add Reference", drop my .dll into an include directory and add that to my solution. I have edited the project property pages, the C/C++ Additional Include Directories option as well as adding the .lib as an additional linker dependency. I have created an include directory for the dll and lib inside my solution tree.
My problem is when I try to include the header files from the documentation, VS output spits out error messages. Now I realize that I am using the dll/lib combo and that the .h files are not present in my solution so how do I add the proper includes? I am using QT toolkit also which is working but how I add the other header / dll from the open source library eludes me.
Can someone please point me in the right direction.
You need to do a couple of things to use the library:
Make sure that you have both the *.lib and the *.dll from the library you want to use. If you don't have the *.lib, skip #2
Put a reference to the *.lib in the project. Right click the project name in the Solution Explorer and then select Configuration Properties->Linker->Input and put the name of the lib in the Additional Dependencies property.
You have to make sure that VS can find the lib you just added so you have to go to the Tools menu and select Options... Then under Projects and Solutions select VC++ Directories,edit Library Directory option. From within here you can set the directory that contains your new lib by selecting the 'Library Files' in the 'Show Directories For:' drop down box. Just add the path to your lib file in the list of directories. If you dont have a lib you can omit this, but while your here you will also need to set the directory which contains your header files as well under the 'Include Files'. Do it the same way you added the lib.
After doing this you should be good to go and can use your library. If you dont have a lib file you can still use the dll by importing it yourself. During your applications startup you can explicitly load the dll by calling LoadLibrary (see: http://msdn.microsoft.com/en-us/library/ms684175(VS.85).aspx for more info)
Cheers!
EDIT
Remember to use #include < Foo.h > as opposed to #include "foo.h". The former searches the include path. The latter uses the local project files.
The additional include directories are relative to the project dir. This is normally the dir where your project file, *.vcproj, is located. I guess that in your case you have to add just "include" to your include and library directories.
If you want to be sure what your project dir is, you can check the value of the $(ProjectDir) macro. To do that go to "C/C++ -> Additional Include Directories", press the "..." button and in the pop-up dialog press "Macros>>".
You mention adding the additional include directory (C/C++|General) and additional lib dependency (Linker|Input), but have you also added the additional library directory (Linker|General)?
Including a sample error message might also help people answer the question since it's not even clear if the error is during compilation or linking.