baby's first wndproc

hw3d/WinMain.cpp

 #include <Windows.h>
 
+LRESULT CALLBACK WndProc( HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam )
+{
+	switch( msg )
+	{
+	case WM_CLOSE:
+		PostQuitMessage( 69 );
+		break;
+	}
+
+	return DefWindowProc( hWnd,msg,wParam,lParam );
+}
+
 int CALLBACK WinMain(
 	HINSTANCE hInstance,
 	HINSTANCE hPrevInstance,
@@ -11,7 +23,7 @@ int CALLBACK WinMain(
 	WNDCLASSEX wc = { 0 };
 	wc.cbSize = sizeof( wc );
 	wc.style = CS_OWNDC;
-	wc.lpfnWndProc = DefWindowProc;
+	wc.lpfnWndProc = WndProc;
 	wc.cbClsExtra = 0;
 	wc.cbWndExtra = 0;
 	wc.hInstance = hInstance;
@@ -35,11 +47,19 @@ int CALLBACK WinMain(
 
 	// message pump
 	MSG msg;
-	while( GetMessage( &msg,nullptr,0,0 ) > 0 )
+	BOOL gResult;
+	while( (gResult = GetMessage( &msg,nullptr,0,0 )) > 0 )
 	{
 		TranslateMessage( &msg );
 		DispatchMessage( &msg );
 	}
 
-	return 0;
+	if( gResult == -1 )
+	{
+		return -1;
+	}
+	else
+	{
+		return msg.wParam;
+	}
 }
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