new function: _WinAPI_FindWindowEx

[mLipok]

Please add _WinAPI_FindWindowEx() to WinAPISysWin.au3

Func _WinAPI_FindWindowEx($hParent, $sClass, $sTitle = "", $hAfter = 0)
        Local $aCall = DllCall('user32.dll', "hwnd", "FindWindowExW", "hwnd", $hParent, "hwnd", $hAfter, "wstr", $sClass, "wstr", $sTitle)
        If @error Then Return SetError(@error, @extended, 0)
        Return $aCall[0]
EndFunc   ;==>_WinAPI_FindWindowEx

​https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-findwindowexa

​https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-findwindowexw

usage example:
​https://www.autoitscript.com/forum/topic/213699-how-can-i-determine-if-tab-item-is-visible-in-tab-control/#findComment-1552569

[Jpm]

Fixed by revision [13408]

Added #4094: _WinAPI_FindWindowEx()