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BeforeCheck Event
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Occurs before the tree node check box is checked.

Syntax

Visual Basic (Declaration) 
Public Event BeforeCheck() As TreeViewCancelEventHandler
Visual Basic (Usage)Copy Code
Dim instance As TOCTree
Dim handler As TreeViewCancelEventHandler
 
AddHandler instance.BeforeCheck, handler
C# 
public event TreeViewCancelEventHandler BeforeCheck()

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