I use my own version of the function which is based on an old SDK sample (non-MFC) since the applications I used it with had to work on older platforms (Win 3.x and 95). Works quite well. Pick up the archive at: http://www.devstuff.com/ftp/code/TransBlt.zip BTW, there is almost no error checking in this version but it can be added without much hassle. Let me know if it works for you.