> You don't want to do this! :)) First, the monitor/video card might not
support the new video mode. Second, an application should never change
system settings. After all, it's user's computer, not ours!

Thanks for your input Vlad & I totally agree with you that its their
computer, not ours.

But how can I solve the problem of displaying those nice graphic pictures
with special effects & more than 256 colors, if users' system are able to
display them but did not set it?

John Low.