RAD Studio VCL Reference
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TTreeView.OnCollapsing Event
TTreeView Class | TTreeView Members | ComCtrls Namespace | Description | See Also
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Occurs when a node is about to be collapsed.

Pascal
property OnCollapsing: TTVCollapsingEvent;
C++
__property TTVCollapsingEvent OnCollapsing;
Description

The TTVCollapsingEvent type points to a method that is called when a node is about to be collapsed. Set the AllowCollapse parameter to false to prevent the node specified by the Node parameter from being collapsed. 

 

See Also
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