>Hi,
>
>My application writting using vfp5a, running under Win9x
>after many days, give error of illegal operations and halt
>all my other vfp application too, resulting in a cold reboot
>to solve it. Plus, it also causes the whole system time
>to slow by half an hour. Any one encounter or face the same
>problem before, pls advise or comment and help me as I am
>in the loss of how to solve this two problems.

Do you do any report previews? There's a memory leak in that process (still exists in VFP6/SP4, I believe).

How about lots of changing of .ICO or .BMP pictures used on buttons, or form backgrounds? This can use up more and more resources, eventually causing Windows to slow down.