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  Console/Windowed Mode
  Submitted by



Some may already know this little trick in Visual C++ (6.0), but I just ran across it last night.

I'm currently working on a game framework for windows that doesn't care if you are running as a windowed or console application. And I've been looking for a nice way of wrapping the functionality of switching between the two modes as some kind of macro set. After a fair bit of twiddling, I've put together the following little code snippet.

// Uncomment the next line and define the appropriate 
// subsytem in the linker 
//#define _CONSOLE 
#ifndef _CONSOLE 
#pragma comment( linker, "/subsystem:windows" ) 
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) 
#else 

#pragma comment( linker, "/subsystem:console" ) int main(int argc, char* argv[] ) #endif { //do stuff }

Yeah, it's an ugly looking directive set and there have got to be at least half a dozen ways to make it pretty. However, the point is, by defining _CONSOLE, I get a console application. By leaving it as is, I get a windowed application. Providing that I do the appropriate code for creating a window.

Why do this? Well, recently I've been seeing a lot of COTD's that have been talking about output to a console. Seems to me that if you replace _CONSOLE with _DEBUG ... you can get a relatively cheap log window.

Your thoughts? Suggestions? Anyone want to try this on a compiler other than VC++?

-Ash

The zip file viewer built into the Developer Toolbox made use of the zlib library, as well as the zlibdll source additions.

 

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