C / C++ / MFC

BOOL CMSILauncherDlg::OnEraseBkgnd(CDC* pDC) {
    <font color=green>// To Paint the BackGround with the IDB_BGND bitmap</font>
    CBitmap BackGroundBitmap;
    BackGroundBitmap.LoadBitmap(IDB_BGND);
    CDC MemDC; 
    MemDC.CreateCompatibleDC(pDC);
    MemDC.SelectObject(&BackGroundBitmap);
 
    CRect ClientRect;
    GetClientRect(&ClientRect);
    CPoint OriginPoint(0, 0);
    CSize BGBitmapSize(BackGroundBitmap.GetBitmapDimensions().cx, 
                       BackGroundBitmap.GetBitmapDimensions().cy);
    <font color=blue>for</font> (OriginPoint.y = ClientRect.top; OriginPoint.y < ClientRect.bottom; OriginPoint.y += BGBitmapSize.cy) {
        <font color=blue>for</font> (OriginPoint.x = ClientRect.left; OriginPoint.x < ClientRect.right; OriginPoint.x += BGBitmapSize.x) {
            pDC->BitBlt(OriginPoint.x,
                        OriginPoint.y,
                        BGBitmapSize.cx,
                        BGBitmapSize.cy,
                        &MemDC,
                        0,
                        0,
                        SRCCOPY);
        }
    }
    <font color=blue>return</font> 1;
}

<font color=green>// this does work</font>
CSize BGBitmapSize(BackGroundBitmap.GetBitmapDimensions().cx,
                   BackGroundBitmap.GetBitmapDimensions().cy);

<font color=green>// this works</font>
CSize BGBitmapSize(190, 187);

<font color=green>// this works too</font>
BackGroundBitmap.SetBitmapDimensions(190, 187);
CSize BGBitmapSize(BackGroundBitmap.GetBitmapDimensions().cx,
                   BackGroundBitmap.GetBitmapDimensions().cy);