Thread: VC++ Win32 SDK Issues

I purchased Role-Playing Game Programming with DirectX and I thought this would be a good time for me to start using Visual C++ since almost all of what I have read says it is the best when having to deal with DirectX.

I am 70% sure I installed the SDK right, but I am getting errors that make it look like it is not installed properly. I can build a basic program with just a WinMain and return 0; but when I started to do more I started to get a lot of errors:

PHP Code:

------ Build started: Project: WinTest, Configuration: Debug Win32 ------
Linking...
main.obj : error LNK2019: unresolved external symbol __imp__PostQuitMessage@4 referenced in function "long __stdcall WindowProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WindowProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__DefWindowProcA@16 referenced in function "long __stdcall WindowProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WindowProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__UnregisterClassA@8 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__DispatchMessageA@4 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__TranslateMessage@4 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__PeekMessageA@20 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__UpdateWindow@4 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__ShowWindow@8 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__CreateWindowExA@48 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__RegisterClassExA@4 referenced in function _WinMain@16 


My code is:

Code:

#include <windows.h>

int WINAPI WinMain(
	HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPSTR lpCmdLine,
	int nShowCmd);

LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);


int WINAPI WinMain(
	HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPSTR lpCmdLine,
	int nShowCmd)
{
	WNDCLASSEX wcex = {sizeof(WNDCLASSEX), CS_CLASSDC, 
					   WindowProc, 0L, 0L, hInstance, NULL,
					   NULL, NULL, NULL, "GameClass", NULL};
	
	if(!RegisterClassEx(&wcex))
		return false;

	HWND hWnd;
	hWnd = CreateWindow("GameClass", "Knights of the Wraith",
		   WS_OVERLAPPEDWINDOW, 0, 0, 400, 400, NULL, NULL, 
		   hInstance, NULL);

	if(hWnd == NULL)
		return false;

	ShowWindow(hWnd, SW_SHOWNORMAL);
	UpdateWindow(hWnd);

	MSG Msg;
	
	ZeroMemory(&Msg, sizeof(MSG));

	while(Msg.message != WM_QUIT) {
		if(PeekMessage(&Msg, NULL, 0, 0, PM_REMOVE)) {
			TranslateMessage(&Msg);
			DispatchMessage(&Msg);
		} else {
		}
	}

	UnregisterClass("GameClass", hInstance);

	return 0;
}

LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch(uMsg){
		case WM_DESTROY:
			PostQuitMessage(0);
			break;

		default: return DefWindowProc(hWnd, uMsg, wParam, lParam);
	}
	return 0;
}

I have looked up the SDK and checked everything and it all looks like the code is valid and the SDK is set up right.

~Wraith

Your compiler does not seem to be recognizing the <windows.h> library.. Be sure you compile your windows api program as a, "windows project" (as opposed to DOS Console)

How would I change my project after already making it, in dev-cpp it was as simple as changing an option in the linker settings, but I don't see an option in the configuration stuff for VC++.

It's a Win32 Application all right, not a console application. (You'd get linker errors complaining about not finding _main.)

The issue here is that you don't link to user32.lib. You can add it in the linker options, section Input. (Project->Settings->Linker Options->Input) Be sure to set it in all profiles.

I don't think you need to prototype WINAPI WinMain() because like main() it is self-prototyping.

If you add #pragma comment(linker,"/subsystem:windows")
Under your includes for your header files, it will tell the compiler at compile time you wish to create a windows application not a console application, so it saves you messing about with the IDE, that is for MSVC++ by the way.

Also adding #pragma comment(lib,"user32.lib")
under your includes will also tell the compile to add it so you don't need to mess with the IDE settings.

Thank you much CornedBee.

John_ The book I am using said to do that, I thought it was odd, but I haven't ever use win32 API before so I thought it might be normal. I commented it out and it worked fine so I think I will just omit it in the future, thanks for the tips.

Originally Posted by Wraithan

The book I am using said to do that,

My guess is the author of the book simply prototypes every function in a file just to give an overview of the contents.

That could be it, I went back to the section that said to do that, and it was lumped in with how great prototyping is because of default values. This book is ment for a C programmer who is starting into C++, but it seems to be working fine for me, who has never coded any C, just C++