Ali,

I do not understand what you mean by saying that "The reason I am using LOCKSCREEN is I do not want my memo text box scrolls to its beginning when the popup form shows up", I seem not able to reproduce the problem, my textbox does not scrols when I call a modal form from the click of a button, can you post a repro?

You might also try using LockWindowUpdate API function, I think it behaves better than LOCKSCREEN (of course, it might not solve your problem at hand <g>)

* In Load of the form
declare LockWindowUpdate in win32api Integer

* In your button's click

LockWindowUpdate(thisform.HWnd)
do form myModalPopupForm
LockWindowUpdate(0)