Creating User Interfaces - Quick Navigation
You can set the focus on a specific User Interface Control Item using
setFocus <rollout_ui_item>
EXAMPLE:
rollout testFocus "Test Focus" ( edittext text1 "Test" edittext text2 "Focus" ) createDialog testFocus 200 100 setFocus testFocus.text2 -- the second text field gets focus!
In 3ds Max 6 and higher,
SetFocus() can be used to set focus on ActiveX controls, too.
Rollout User-Interface Controls Types
ActiveX Controls in MAXScript Rollouts