Re: Using SetLayeredWindowAttributes for CWnd object.

Hi,

u can handle transparent Childs by use new function in CDC
named AlphaBlit, PseudoCode :

CMemDC is Key like Google :-)

void CPatWnd::OnPaint()
{
 CPaintDC dc(this);
 CRect rc; GetClientRect(rc); //dc.m_ps.rcPaint

 CMemDC MemDc(&dc,this,false,rc);
 CDC* pDC(&MemDc);
 CDC dcPlot; dcPlot.CreateCompatibleDC(pDC);
 CBitmap bitmapPlot;
bitmapPlot.CreateCompatibleBitmap(pDC,rc.Width(),rc.Height());
 CBitmap *pbitmapOldPlot(dcPlot.SelectObject(&bitmapPlot));
 dcPlot.FillSolidRect(rc,m_pat.m_rgb);

 BLENDFUNCTION bld = {AC_SRC_OVER,0,64,0};
        pDC->AlphaBlend(0,0,rc.Width(),rc.Height(),&dcPlot,0,0,rc.Width(),rc.Height(),bld);
 dcPlot.SelectObject(pbitmapOldPlot);
}

best regards
  Karsten schulz
   (www.kahnsoft.de)

<sujeet27kulk@gmail.com> schrieb im Newsbeitrag
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