Member Avatar for Covinus 
void CMod7aView::OnPaint() 
{
	CClientDC dc(this);

    
 
 if(hBmp!=NULL)
 {
	 CBitmap bmp;
	 bmp.Attach(hBmp);
 
   CDC bmDC;
   bmDC.CreateCompatibleDC(&dc);
   CBitmap *pOldbmp = bmDC.SelectObject(&bmp);
   BITMAP  bi;
   bmp.GetBitmap(&bi);
   dc.BitBlt(0,0,bi.bmWidth,bi.bmHeight,&bmDC,0,0,SRCCOPY);
   bmDC.SelectObject(pOldbmp);

   

  
}

how do you make your image persistant? everytime iload a bitmap after I move the main window the image disappears.

pls help me.

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  • Latest Post Latest Post by Covinus
Member Avatar for vijayan121

you need to use a CPaintDC (not a CClientDC) in a handler for OnPaint (WM_PAINT requires calls to BeginPaint/EndPaint). it would be much better (and easier) if you override the virtual function CView::OnDraw( CDC* ) and write your code for painting the view there (and not implement OnPaint yourself). let the framework do all the work including creating the right device context and then call your override for OnDraw.

Member Avatar for Covinus

i transfered my code to OnDraw but nothing comes out

Member Avatar for vijayan121

you also need to

a. remove your handler for OnPaint()
b. use the device context that is passed as an arg to OnDraw

  ... :: OnDraw( CDC* pDC )
 {
       pDC->whatever ...
 }
Edited by TrustyTony because: fixed formatting
Member Avatar for Covinus

my bitmap is persistent on the window. Thanks a million. now my problem is to rotate it. im gonna do some googling for now. thanks again

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