# Function Reference

# _WinAPI_UnionRect

Creates the union of two rectangles

#include <WinAPIGdi.au3>
_WinAPI_UnionRect ( $tRECT1, $tRECT2 )

## Parameters

$tRECT1 | $tagRECT structure that contains the first source rectangle.
$tRECT2 | $tagRECT structure that contains the second source rectangle.

## Return Value

Success: | $tagRECT structure that contains the union of the $tRECT1 and $tRECT2 rectangles.
Failure: | Sets the @error flag to non-zero.

## Remarks

The union is the smallest rectangle that contains both source rectangles. The system ignores the
dimensions of an empty rectangle that is, a rectangle in which all coordinates are set to zero, so that
it has no height or no width.

## See Also

Search UnionRect in MSDN Library.