CXTPButton with rounded corners

You can always override OnPaint and draw a button to suit your needs. We do that and use custom background masks to get various shapes including elliptical. We have to built the mask and use PatBlt and BitBlt. Then we use BitPlt and MaskBlt in our code. And of course the correct rop code has to be used and you may want to handle various effects such as shifting the image on mouse down. It took me a bit of tweaking to get everything aligned properly and to get the mask created (we have some mono bitmaps that define the shapes). Probably pretty easy for a GDI jock. The key is the mask. Once we have the background image loaded we do this:

// CreateBitmapMask will fill the background of the monochrome bitmap with WHITENESS (1s) and

// fill the foreground area (where color in the image dc exists) with black (0s). It assumes

// that the hDCImage global is valid and contains the foreground/face of the button.

void OurButton::CreateBitmapMask( CBitmap* cBit, CPoint ptOffset )

{

CRect rect;

GetClientRect (rect);

CSize sizeButton = rect.Size();

CSize sizeImage = GetBitmapSize(m_hbmImage);

PatBlt(hDCMono, 0, 0, sizeButton.cx, sizeButton.cy, WHITENESS);

SetBkColor(hDCImage, m_bTrueColorBitmap ? s_TrueColorBackground : GetSysColor(COLOR_BTNFACE));

BitBlt(hDCMono, ptOffset.x, ptOffset.y, sizeImage.cx, sizeImage.cy, hDCImage, 0, 0, SRCCOPY);

}

Then when drawing the button we use MaskBlt with the mask the above code created.