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Reference for unit 'InterfaceBase' (#lcl)

TWidgetSet.IntersectClipRect

Shrinks the clipping region of an Device Context to a rectangular boundary, e.g. a text area.

Declaration

Source position: winapih.inc line 172

public function TWidgetSet.IntersectClipRect(

dc: HDC;

Left: Integer;

Top: Integer;

Right: Integer;

Bottom: Integer

):Integer; virtual;

Function result

The region type, zero on failure.

Description

Use this method before painting into a rectangle in an DC, to clip everything outside the rectangle and outside the current clipping region of the DC.

The result can be one of the following constants:
Error NullRegion SimpleRegion ComplexRegion Region_Error.

Version 4.0

Generated 2025-05-03

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