[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'Forms' (#lcl)

TControlScrollBar.HandleAllocated

True when the associated TScrollingWinControl and its handle are valid.

Declaration

Source position: forms.pp line 123

protected function TControlScrollBar.HandleAllocated: Boolean; virtual;

Function result

True when the associated TScrollingWinControl and its handle are valid.

Description

Used in methods which call LCL interface routines to avoid exceptions resulting from an unassigned control or an invalid handle value.

Version 4.0 Generated 2025-05-03 Home