在按钮上显示图片

    case WM_CREATE :

        BS_hwnd = CreateWindow ( TEXT("button"), 
            L"PUSHBUTTON",
            WS_CHILD | WS_VISIBLE | BS_BITMAP,
            10, 10,
            140, 60,
            hwnd, (HMENU) 1,
            ((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
        SendMessage(BS_hwnd,   
            BM_SETIMAGE, 
            (WPARAM) 0, 
            (LPARAM) LoadImage ( 0,  L"C:\\1.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE )
            );
        break;