Vcl.ComCtrls.TTreeNodes.BeginUpdate

• Up to Parent: TTreeNodes

Delphi

procedure BeginUpdate;

C++

void __fastcall BeginUpdate();

Properties

Type	Visibility	Source	Unit	Parent
procedure function	public	Vcl.ComCtrls.pas Vcl.ComCtrls.hpp	Vcl.ComCtrls	TTreeNodes

Description

Prevents the updating of the tree view until the EndUpdate method is called.

BeginUpdate prevents the screen from being repainted when new nodes are added, deleted, or inserted. Tree nodes affected by the changes will have invalid Index values until EndUpdate is called.

Use BeginUpdate to prevent screen repaints and to speed processing time while adding nodes to the tree view.

Note: Calls to BeginUpdate are cumulative; for every call to BeginUpdate there must be a corresponding call to EndUpdate.

See Also

• EndUpdate

Code Examples

• AddChildObjectFirst (Delphi)
• AddChildObjectFirst (C++)