To Jean-Marie Jean-Marie , I have been trying to get Thumbnail as default in openfilename dialog. I tried MFC approach, and I could not make it happen because I am not familiar with MFC I am wondering if "Brad Martinez" approach can be implemented with C or C++ language. You suggested "Brad Martinez " article. I do not know much about the language "Brad Martinez " is using but it looks very streight forward. Do you think that you can show me how I can convert Martinez code into C or C++ code in XP platform ? Thank you, ChanChiTheGraphics