>In my treeview, I have several bitmaps. They have a grey background. >This >is good is the user has defined his Windows configuration to use grey >background. For those user having a Windows configuration with a white >background, I can see that the bitmap is not transparent. Do we have >to use >a mask to avoid that problem? Have you tried setting the 'transparent' portion of the bitmap to white? It would be good if this inherited that feature of FP. (I don't expect the .MSK file would work if this didn't). Have you tried either .CUR or .ICO files? /Paul