Occurs when a Node object in a TreeView control is expanded, that is, when its child nodes become visible.
Syntax
Private Sub object_Expand(ByVal node As Node)
The Expand event syntax has these parts:
| Part | Description |
| object | An object expression that evaluates to an object in the Applies To list. |
| node | A reference to the expanded Node object. |
Remarks
The Expand event occurs after the Click and DblClick events.
The Expand event is generated in three ways: when the user double-clicks a Node object that has child nodes; when the Expanded property for a Node object is set to True; and when the plus/minus image is clicked. Use the Expand event to validate an object, as in the following example:
Private Sub TreeView1_Expand(ByVal Node As Node)
If Node.Index <> 1 Then
Node.Expanded = False ' Prevent expand.
End If
End Sub