异形窗口代码

BOOL CBmpDlg::OnEraseBkgnd(CDC* pDC)
{
    HBITMAP hBackgroundBMP = (HBITMAP)LoadImage(NULL, "Skin/QQDialog.bmp",IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);

    CBitmap bmp;
    bmp.Attach(hBackgroundBMP);

    CDC imageDC;
    imageDC.CreateCompatibleDC(pDC);
    imageDC.SelectObject(bmp);

    pDC->TransparentBlt(0, 0, 450, 517, &imageDC, 0, 0, 450, 517, RGB(255, 0, 255));

    return TRUE;
}