Posts messages when the mouse pointer leaves a window or hovers over a window for a specified amount of time
#include <WinAPISys.au3>
_WinAPI_TrackMouseEvent ( $hWnd, $iFlags [, $iTime = -1] )
| $hWnd | Handle to the window to track. |
| $iFlags | The services requested. This parameter can be a combination of the following values. $TME_CANCEL $TME_HOVER $TME_LEAVE $TME_NONCLIENT $TME_QUERY |
| $iTime | [optional] The hover time-out (if $TME_HOVER was specified in $Flags), in milliseconds. Can be (-1) (Default), which means to use the system default hover time-out. |
| Success: | True |
| Failure: | False |
Search TrackMouseEvent in MSDN Library.