Vcl.Controls.TControl.Invalidate

• Up to Parent: TControl

Delphi

procedure Invalidate; virtual;

C++

virtual void __fastcall Invalidate();

Properties

Type	Visibility	Source	Unit	Parent
procedure function	public	Vcl.Controls.pas Vcl.Controls.hpp	Vcl.Controls	TControl

Description

Completely repaints the control.

Use Invalidate when the entire control needs to be repainted. When more than one region within the control needs repainting, Invalidate will cause the entire window to be repainted in a single pass, avoiding flicker caused by redundant repaints. There is no performance penalty for calling Invalidate multiple times before the control is actually repainted.

See Also

• Refresh

• Repaint

• Update

Code Examples

• ClipRect (Delphi)
• ClipRect (C++)