Regarding form design

I have a form ,in that form ,i hav a button ,by clicking a sub form will open in the same parent form ,my requirement is that parent form should nt be used till sub form is opn,once closing the subform we can use the main form ,how to set the property or how to acheive it?

set window type property = Popup in the design’s properties list of the sub form.

ya thanks i got it…

Nice desgns! You are really creative to came up with a beautiful design.