I have looked after, without luck, a free C/C++ API for Windows that can be used in a project I am about to start. There are libraries for Java and C# but the fact is there is no one for C/C++. I need an API that can be integrated in a vs project and we cannot use libraries that run in servers ( as CGI scripts or whatever ). Does anyone know this type of API?
if you want to generate QRcodes have a look at libqrencode it works with cygwin on windows (not sure about VS).
If you want to decode QRcodes have a look at zxing
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I have an executable I made using a CLI console application with Visual Basic 2010. I can run the program completely fine from my developer machine.
However, when I copy the executable over to another machine, re-boot to a pre-installation environment and run the executable again, nothing happens at all. There are no errors shown or anything.
My guess is the executable can't run without certain dependencies that aren't loaded at this environment, but I need it to work in a PE.
Any ideas on whats going on?
First of all, since the question is tagged "c++" and you mention C++/CLI several times, I assume that "Visual Basic 2010" is a typo for "Visual Studio 2010". But either way, whether you've written the application in Visual Basic (VB.NET) or C++/CLI, the problem is exactly the same.
My guess is the executable can't run without certain dependencies that aren't loaded at this environment, but I need it to work in a PE.
That's exactly correct. You've written an application that targets the .NET Framework. Somewhat like Java applications requiring a JVM, .NET applications require that the .NET Framework be installed in order to run (or a compatible alternative implementation, like Mono). Unfortunately, Windows PE does not support the .NET Framework.
Note that it is irrelevant whether you've written a WinForms, WPF, or Console application. Although they present their UI in very different ways, they all depend on the .NET Framework being installed.
You will need to (re-)write the application in a different programming language, one that generates native code without any dependencies on the .NET Framework. C and C++ are popular choices. If you choose to use C++, make sure that you create what Visual Studio calls a "Win32" project. This is one that targets the underlying operating system APIs directly (i.e. a native application) and does not have a dependency on the .NET Framework. Stay away from anything that has ".NET" or "CLR" in its description.
I don't really have a full comprehension of when an application is using .NET or not... I am just used to Linux C/C++ development. I hate Microsoft shit
It uses .NET whenever you use the .NET Framework libraries/classes in your code. I'm not really sure why this is so difficult to understand. The same problem could easily exist on Linux if you were using a third-party library that was not available in certain environments for whatever reason. This is not Microsoft's problem, it's an issue of using the wrong tools for the job. The .NET Framework is an object-oriented wrapper around the native APIs that makes it much easier for people to get up and running writing programs for Windows. But if you're "used to Linux C/C++ development", you should have little trouble writing a simple console application that targets the native APIs directly without using .NET.
If your hatred for "Microsoft shit" has turned into an allergy, you can avoid Visual Studio entirely and download MinGW, which is a Windows port of the GCC compiler you're probably used to. Combined with your favorite Windows port of Vi, you're working in an environment very similar to the one you're used to. And since GCC doesn't support C++/CLI or the .NET Framework, you won't have to worry about getting stuck picking the wrong option.
The .Net framework has been supported as an optional package install during your PE build process for the past couple versions of WinPE. I write code in C# that I run in WinPE everyday. I have yet to find a good way to debug in a manner where I can walk through break points, etc... though. My best option has just been a lot of logging and a global Exception catch around my main entry point that will write out a full stack dump. You can attach to your app as a remote process in a VM running WinPE, but if you need to catch something early in the execution you'll have a difficult time.
I have a project that requires writing a code for small executable file. I used visual C++ express 2010 IDE to create this file. After I finished writing the code, I tried to copy it to a couple of different PCs. It gives me an error message every time I clicking on this file to execute it. The message states that I have to install (.NET framework). I watched a couple videos on YouTube explaining how overcome this problem by changing the runtime library from multi-threaded Debug DLL (/MDd) to multi-threaded Debug (/Mtd). However; the IDE can’t debug the C++ code because when I create my project by using CLR template!
Is there any way to solve this problem? Can I create a similar program that not requires any further downloading once I using on different PC?
Is learning a different language like JAVA or C# will help creating small programs (like my program) that run on most Window platform machine?
Just use Qt - it runs on Windows, Linux, MacOS, support for Android and iOS is scheduled for this year, plus it supports embedded platforms and some of the more obscure mobile platforms. Also, support for Windows RT was just kickstarted. A complete library with tons of functionality, good documentation and lots of educational resources. It provides tons of tools, from implicitly shared containers through threading, signals and slots, 2D and 3D graphics, widgets, multimedia, sensors... and whatnot...
You can even develop commercial applications under the LGPL license.
Also comes with a pretty good IDE - Qt Creator.
You can develop standard C++ applications or use QML, which is a JavaScript like language for markup and scripting, which is used to build applications from C++ implemented components. You can also extend QML. It is much faster to develop with QML and you still get the advantages of platform native binary under the hood.
Note that you will still need to either ship a few DLLs with your application. Unless of course you use a static build, which requires you to either have your application open source, or purchase a commercial license... which doesn't come cheap...
But still, a few MB of DLLs are far better than the entire .NET framework. A static build will produce executables about 8-9 MB with no external dependencies.
Stick with the C++ standard, avoid Microsoft extensions (managed code), and call only POSIX functions of your OS, then you should be able to write portable programs.
You seem to have created a Managed C++ Project. Instead create an empty Win32 C++ project and then add in your .cpp/.h files. This will limit you to the default libraries available on all PCs with the C++ runtime. If you want to remove that dependency too then statically compile in the runtime using the /MT option. Details # http://msdn.microsoft.com/en-us/library/2kzt1wy3(v=vs.71).aspx
As you move ahead you would need to be conscious of what libraries you take dependencies on and what versions of the OS are those libraries available on or if you need to package them with your bits.
Both Java and C# will help making portable programs. Usually, people will have to install runtime environments for executables written in these two languages, however. These days, C++ is more portable than ever. You can easily run C++ executables in your browser:
https://github.com/kripken/emscripten
http://code.google.com/p/nativeclient/
This makes many of the reasons why Java and C# came about irrelevant.
Open standards like OpenGL also make portable GUI programming easier than ever. Try Qt, if you want to write a simple GUI in C++.
Note: It is possible to run C++ program in any computer without installing anything if you haven't use .NET framework. In your case, there can be two reasons to trigger error in target computer.
New computer doesn't have required run-time assembles.
New computer doesn't have required .NET framework installed.
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So what to do:
Before start your program you have to design weather are you going to use .NET framework support or not. If you use .NET framework when you develop your program, then you much install same or higher .NET framework in target computer.
If you no need to use .NET component then your target computer should only containing run-time assemblies.
How to get rid of .net framework
right click on the project in solution -> properties -> General -> Common language run time support -> select "No common language run time support".
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Then what you need is only relevant run-time assemblies be in target computer.
How can run-time assemblies be in new computer:
There are two ways:
Install suitable C++ disputable environment in target computer(if you use VS2008 SP1, C++ RD package should be this. Please consider the solution build architecture also (32 bit/64 bit) before download ).
Deploy run-time assemblies with your solution package. (I like this because user no need to install any third party components)
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How Deploy assemblies with my project:
for this your all DLL, LIB, EXE should use same run time version.(if not, you face troubling to redirect assemblies by 'manifest' files ).
How to check the run-time version.
open DLL,EXE by visual studio (open->file) -> expand RT_MANIFEST-> double click the file under it ->then assembly dependency details will open. -> copy the data in right column and paste to note pad.
You will see this kind of line there. and ther is the version run-time assemblies your specific DLL or EXE use.
assemblyIdentity type="win32" name="Microsoft.VC90.CRT" version="9.0.21022.8" processorArchitecture="x86".....
After identifying the version of run-time assemblies follow this tutorial and try to run in fresh installed computer.
At last: If you think this bla.. bla.. is so complex and your program is very simple, then you can consider about "run time assemblies statically linking" (try Google). But personally I don't like this method.
good luck!
Currently we have a legacy client/server system written in MFC(server) and Java(client). This system cant not run on Internet because of various reason. So, we are developing a small system (very few functionalities of this legacy system) in cake php etc to fullfill customer requirement.
Now, one functionality in legacy system needs in this new system. We are thinking of making a DLL of that code and then integrate it with cake php (to save time) but this DLL will not work on Linux where this new system will sit.
So, is there any way to generate a dll so that it works with php in Linux system using QT etc?
OR
we have to rewrite the whole thing? In this case, what would be the most appropriate framework to develop cross platform dll. I would prefer to use Windows to write it.
Also, can we run dll with cake php?
Thanks
So, is there any way to generate a dll so that it works with php in Linux system using QT etc?
No, Linux doesn't support the DLL file format. You may want to compile a shared object file in the ELF format from your source code.
I think, the two most prominent cross platform GUI libraries are wxWidgets and Qt.
You cannot use a Windows DLL as a part of a Linux application. That is simply not possible, because of the different object formats.
So, the only option is to rewrite or port it in some form.
A guide for porting your application might be Porting MFC applications to Linux, which uses wxWidgets.
Another one using Qt, could be MFC to Qt Migration - Walkthrough.
I am a perl developer that has never went into the client side programming of things. I'd like to think that I'm a pretty good developer, except I know that my severe lack of knowledge of the way desktop programming really takes away from my credibility.
That said, I really want to get into doing some desktop applications.
I want to try to develop a simple application that will connect to my server and grab an rss feed, then display it in the console. My plan of attack is to use libcurl (and curlpp) to grab the feed (I'd also like to do more curl stuff in the future). But I want to be able to run this small program on linux, windows, and mac because I want to understand developing cross platform.
So here is the question (and I know it is extremely noobish): How do I write c++ code that will use libcurl and curlpp, and will work on the 3 major OSes? The main thing I don't understand is if I have to compile libcurl and curlpp, then how does it work when trying to take it over to the other platforms?
You need to write the code portably - basically make it a console application. You then transfer the source code (not the exe) to the other platforms and compile it there and link with the version of llibcurl on each specific platform.
Neil is right, but using a framework will make your life easier. Try QT it is very nice. It has a cross platform http API, and integrates curl.
I'd recommend Qt4 as well, I've wrote a small'ish tutorial on how to setup a windows gcc compiler on linux and compile Qt4/OpenSSL with it for windows, hope that helps.
http://www.limitlessfx.com/mingw-openssl-qt4-for-windows-on-linux.html
You can easily adapt that tutorial to compiling libcurl instead of just moving to Qt4.
I need to give an estimate for porting a standalone program to a Mac from a .NET platform. I have all the source code which is in C++ and is both code I wrote and a modified version of GLUT/GLUI because the program uses OpenGL and GLUT/GLUI as a UI.
I don't think the C++ code will be a problem or the OpenGL environment, please tell me if you think it will be. In .NET, I use OpenGL32.DLL and deploy it with my app. I need to find out how this is done for a Mac?
I really need to know what the current deployment method is for Mac's these days and how hard it will be for me to write for it. For .NET, I use Visual Studio for the application development and deployment, I make a new VS project to build the deployable MS installer.
The deployment process also allows things like placing a desktop shortcut, associate a unique icon with the program ... What deployment options can one select on a Mac? What do you think the biggest obstacles will be?
There's no .NET framework calls within the code. The deployment phase produces a .NET assembly with all the security features. I think that is the main relationship with .NET since it is straight C++ not C#.
Development should be rather straight-forward. You'll be able to do OpenGL/GLUT/etc... through the Cocoa framework. Look at this example from Apple to see how it is done in code.
As for development tools, you will be able to use Xcode (which is free with the Mac). You can develop in C++ and compile with GCC.