Hello, Using Grx24 (or greater) with djgppv2, the next problem appear under windows 98 or Xp when I use an Ati Radeon 9600 graphic card. In resolutions greater than 640x480, 256 colors or more, GrPixel or similaries orders that read the color of a portion of screen (GrBitBlt for example), give bad results. The portion that is read is often an other portion of the screen. The consequence is that the mouse erase all under it. It is thence impossible to use the mouse. The problem appear with the demogrx.exe for example, or with doing: mousetst 1024 768 256 , that test mouse in resolution 1024x768 256 colors. Is this a bug in grx or in the graphic card ? No problem using mingw and grx246 with the same graphic card. Thank you for the answer. Serge Cabala. P.S. I have done very good animations on waves using grx246. You can download these animations on my internet site htt://members.aol.com/scabala25 (site in french) . You can also find the site with Google for example, keywords : serge cabala