How to resize a dialog?

Hi!I've got a question here.

I wanna achive this effect:
Resizing the dialog then the controls on it,like button,listbox,...,automatically change their size and pos to match the dialog's size.

And I've found some related content on Help:

on Rollout moved Point2 do
Called when the dialog is being moved.
on Rollout resized Point2 do
Called when the dialog is being resized.
on Rollout mousemove Point2 do
Called when the mouse is being moved within the dialogs client area.

I think this one should work
on Rollout resized Point2 do

But how it works?

When I type this:
on test_Rollout resized do
I got an error: >> MAXScript Rollout Handler Exception: -- Argument count error: unnamedRollout.resized wanted 0, got 1 <<

Maybe I lost the Point2 part,so I typed:
on test_Rollout resized [10,10] do
I also got an error: -- Syntax error: at [, expected do -- In line: on unnamedRollout resized [1

That's my problem.
Anyone could help?
Thanks!