# Function Reference

# _WinAPI_GetMessageExtraInfo

Retrieves the extra message information for the current thread

#include <WinAPISysWin.au3>
_WinAPI_GetMessageExtraInfo ( )

## Return Value

Returns the value associated with the current thread.

## See Also

Search GetMessageExtraInfo in MSDN Library.

## Example

    #include <GUIConstantsEx.au3>
    #include <SendMessage.au3>
    #include <WinAPIMem.au3>
    #include <WinAPIMisc.au3>
    #include <WinAPISysWin.au3>
    #include <WindowsNotifsConstants.au3>

    Global Const $WM_MYMESSAGE = _WinAPI_RegisterWindowMessage('MyMessage')

    _Example()

    Func _Example()
        Local $hForm = GUICreate('Test ' & StringReplace(@ScriptName, '.au3', '()'), 400, 93)
        Local $idInput = GUICtrlCreateInput('', 20, 20, 360, 20)
        Local $idButton = GUICtrlCreateButton('Send', 165, 59, 70, 23)
        GUIRegisterMsg($WM_MYMESSAGE, 'WM_MYMESSAGE')
        GUISetState(@SW_SHOW)

        Local $pString
        While 1
            Switch GUIGetMsg()
                Case $GUI_EVENT_CLOSE
                    ExitLoop
                Case $idButton
                    $pString = _WinAPI_CreateString(GUICtrlRead($idInput))
                    _WinAPI_SetMessageExtraInfo($pString)
                    _SendMessage($hForm, $WM_MYMESSAGE, 1, 255)
                    _WinAPI_FreeMemory($pString)
            EndSwitch
        WEnd
    EndFunc   ;==>_Example

    Func WM_MYMESSAGE($hWnd, $iMsg, $wParam, $lParam)
        #forceref $hWnd, $iMsg

        Local $pString = _WinAPI_GetMessageExtraInfo()

        If _WinAPI_IsMemory($pString) Then
            ConsoleWrite('WM_MYMESSAGE | WP = ' & Number($wParam) & ' | LP = ' & Number($lParam) & ' | EXTRA = "' & _WinAPI_GetString($pString) & '"' & @CRLF)
        EndIf
    EndFunc   ;==>WM_MYMESSAGE