changing buttons and xpms

["Hari Prasad Nadig" <hpnadig myrealbox com>]

ried to code for something like this:

(choice 1)
show button1;
(choice 2)
show button2 at the same place...

but in vain...

Can anybody help me out to achieve this... I would appreciate examples showing how to...

an' more... I want to get this done for xpms also...

Thank you.