#include <windows.h>

 	{
			hdc = BeginPaint(hwnd,&ps);
			EndPaint(hwnd,&ps);
			return(0);
		}
		break;

		case WM_DESTROY: 
		{
			PostQuitMessage(0);
			return(0);
		}
		break;

		default:
		break;	
	}

	return(DefWindowProc(hwnd,msg,wparam,lparam));
}

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hprevinstance, LPSTR lpcmdline, int ncmdshow)
{
	WNDCLASSEX	winclass;
	HWND		hwnd;
	MSG			msg;

	//Fenstereigenschaften festlegen:
	winclass.cbSize			 = sizeof(WNDCLASSEX);
	winclass.style			 = CS_HREDRAW | CS_VREDRAW;
	winclass.lpfnWndProc	         = WindowProc;
	winclass.cbClsExtra		 = 0;
	winclass.cbWndExtra		 = 0;
	winclass.hInstance		 = hinstance;
	winclass.hIcon			 = LoadIcon(NULL, IDI_APPLICATION);
	winclass.hCursor		 = LoadCursor(NULL, IDC_ARROW);
	winclass.hbrBackground	         = (HBRUSH)GetStockObject(BLACK_BRUSH);
	winclass.lpszMenuName	         = NULL;
	winclass.lpszClassName	         = WINDOW_CLASS_NAME;
	winclass.hIconSm		 = LoadIcon(NULL, IDI_APPLICATION);

	hinstance_app = hinstance;

	if(!RegisterClassEx(&winclass))
		return(0);

	if(!(hwnd = CreateWindowEx(NULL,WINDOW_CLASS_NAME,"MEIN PROGRAMM", WS_POPUP | WS_VISIBLE, 0,0, 1024,768,NULL,NULL, hinstance, NULL)))
		return(0);

	main_window_handle = hwnd;

	while(TRUE)
	{
		if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
		{
			if(msg.message == WM_QUIT)
				break;

			TranslateMessage(&msg);

			DispatchMessage(&msg);
		}

		//Programm_Hauptschleife();

	}

	return(msg.wParam);
}

Hier der Linkererror[beim erzeugen der Exe] (beim Kompilieren erhalte ich keine Fehler):

LIBCD.lib(crt0.obj) : error LNK2001: Nichtaufgeloestes externes Symbol _main
Debug/main.exe : fatal error LNK1120: 1 unaufgeloeste externe Verweise
Fehler beim Ausführen von link.exe.

Hoffe mir kann jmd. helfen

Lurnon

#define WINDOW_CLASS_NAME "Shell Window"
HWND      main_window_handle = NULL; 
HINSTANCE hinstance_app      = NULL; 

LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
	PAINTSTRUCT ps;
	HDC			hdc;

	//Nachrichtenverarbeitung
	switch(msg) //case of
	{
		case WM_CREATE:	
		{
			return(0);
		}
		break;

		case WM_PAINT: