# Function Reference

# _WinAPI_ValidateRect

Removes a rectangle from the current update region of the specified window

#include <WinAPIGdi.au3>
_WinAPI_ValidateRect ( $hWnd [, $tRECT = 0] )

## Parameters

$hWnd | Handle to the window whose update region is to be modified. If this parameter is 0, the system invalidates and redraws all windows and sends the WM_ERASEBKGND and WM_NCPAINT messages to the window procedure before the function returns.
$tRECT | [optional] $tagRECT structure that contains the client coordinates of the rectangle to be removed from the update region. If this parameter is 0 (Default), the entire client area is removed.

## Return Value

Success: | True
Failure: | False

## See Also

Search ValidateRect in MSDN Library.