Thread: Windows Using Win32 API With M$ VC++

Do you mean to cover the whole screen?

Code:

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hwnd,UINT Message,WPARAM wParam,LPARAM lParam);

int WINAPI WinMain( HINSTANCE hInst,
					HINSTANCE hPreInst,
					LPSTR lpszCmdLine,
					int nCmdShow )
{
	HWND    hwnd;    
	MSG     Msg;   
	TCHAR   *szClassName = TEXT("SIMPLEWND");
	WNDCLASSEX wcx = {0};    
	
	wcx.cbSize			 = sizeof(WNDCLASSEX);
	wcx.style            = CS_HREDRAW | CS_VREDRAW;          
	wcx.lpfnWndProc      = (WNDPROC)WndProc;               
	wcx.hInstance        = hInst;                      
	wcx.hIcon            = LoadIcon(NULL,IDI_APPLICATION);                         
	wcx.hCursor          = LoadCursor(NULL,IDC_ARROW);                         
	wcx.hbrBackground    = (HBRUSH)GetStockObject(BLACK_BRUSH);      
	wcx.lpszClassName    = szClassName;                    
                         
	if (!RegisterClassEx(&wcx)){
    	return 1;
    }

	hwnd=CreateWindowEx(WS_EX_TOPMOST,                               
	                    szClassName,                      
	                    TEXT(""),            
	                    WS_POPUP | WS_VISIBLE,                
	                    0,   
	                    0,   
	                    GetSystemMetrics(SM_CXSCREEN),   
	                    GetSystemMetrics(SM_CYSCREEN),    
	                    NULL,                               
	                    NULL,                               
	                    hInst,                       
	                    NULL);                              
	
	ShowWindow(hwnd,nCmdShow);
	UpdateWindow(hwnd);
	
	while (GetMessage(&Msg,NULL,0,0)>0){
	    TranslateMessage(&Msg);
	    DispatchMessage(&Msg);
    }
	return Msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd,UINT Message,WPARAM wParam,LPARAM lParam)
{
	switch (Message){
		case WM_KEYDOWN:
			if(wParam != VK_ESCAPE){//Press escpae to quit
				PostQuitMessage(0);  
				return 0;
			}
	    case WM_DESTROY:
	        PostQuitMessage(0);  
	        return 0;
	    default:
	        return DefWindowProc(hwnd,Message,wParam,lParam); 
    }
}