LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	static bool pressed = false;
	static char text[] = "Der Button wurde gedrückt";

	switch (message)
	{
		case WM_CREATE:
			CreateWindow("BUTTON","Klick mich",WS_CHILD|WS_VISIBLE,10,10,200,25,hwnd,(HMENU)1,((LPCREATESTRUCT)lParam)->hInstance,NULL);
			return (0);

		case WM_COMMAND:
			if(HIWORD(wParam) == BN_CLICKED)
			{
				switch(LOWORD(wParam))
				{
					case 1:
						pressed = !pressed;
						InvalidateRect(hwnd,NULL,true);
						break;
				}
			}
			return (0);

		case WM_PAINT:
			hdc = BeginPaint (hwnd, &ps);
			if(pressed) TextOut (hdc, 10, 50, text, sizeof(text));
			EndPaint (hwnd, &ps);
			return (0);

		case WM_DESTROY:
			PostQuitMessage (0);
			return (0);
	}
	return DefWindowProc (hwnd, message, wParam, lParam);
}