Derek, (I hope that I have replied in the correct way.) An X-Window book I have describes how to set up an icon thus: #define IWidth 64 #define Iheight 64 static char Ibits[] = { 0x00, 0x00, ..........etc 0x04, 0x01, etc etc }; PixMap IPixMap; And then creates the image as IPixMap = XCreateBitmapFromData( theDisplay, theNewWindow, Ibits, IWidth, Iheight ); You could write your own data into the char variable and use the above converter. I am a raw beginner, so I don't know if this helps, but it the way an old fashioned programmer would do it. Regards, Colin