# Function Reference

# _WinAPI_InProcess

Determines whether a window belongs to the current process

#include <WinAPISysWin.au3>
_WinAPI_InProcess ( $hWnd, ByRef $hLastWnd )

## Parameters

$hWnd | Window handle to be tested
$hLastWnd | Last window tested. If $hWnd = $hLastWnd, this process will immediately return True. Otherwise, _WinAPI_InProcess() will be called. If $hWnd is in process, $hLastWnd will be set to $hWnd on return.

## Return Value

True: | Window handle belongs to the current process
False: | Window handle does not belong to the current process

## Remarks

This is one of the key functions to the control memory mapping technique. It checks the process ID of the
window to determine if it belongs to the current process, which means it can be accessed without mapping the control memory.