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4/8/2010

This function validates the client area within a region by removing the region from the current update region of the specified window.

Syntax 

BOOL WINAPI ValidateRgn(
  HWND 
hWnd,
  HRGN 
hRgn
);

Parameters

hWnd

[in] Handle to the window for which you want to modify the update region.

hRgn

[in] Handle to a region that defines the area that you want to remove from the update region.

Set this parameter to NULL to remove the entire client area.

Return Value

A nonzero value indicates success.

Zero indicates failure.

Remarks

You must create the specified region by calling a region function, such as ExtCreateRegion.

ValidateRgnassumes that the region coordinates are client coordinates.

The BeginPaintfunction validates the entire client area.

Do not call ValidateRector ValidateRgnif you require validation of a portion of the update region before the next WM_PAINTmessage is generated.

Requirements

Header windows.h
Library coredll.lib
Windows Embedded CE Windows CE .NET 4.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also