>Is it possible to change the image on a button when the mouse goes over it but WITHOUT GETTING IT FROM DISK? I don't know...maybe something like in VB (Image arrays) ?

Why? If its in order to not have the BMP available sitting around on disk, you can build them into the EXE, or save them memofields ina a table, you could even build that into an EXE, but you would have to extract them somewhere onto disk to use them.