# Function Reference

# _GUICtrlMonthCal_SetFirstDOW

Sets the first day of the week for a month calendar control

#include <GuiMonthCal.au3>
_GUICtrlMonthCal_SetFirstDOW ( $hWnd, $sDay )

## Parameters

$hWnd | Control ID/Handle to the control
$sDay | In the following format: 0 or "Monday" 1 or "Tuesday" 2 or "Wednesday" 3 or "Thursday" 4 or "Friday" 5 or "Saturday" 6 or "Sunday"

## Return Value

Success: | the previous first day of the week.
Failure: | -1.

## Related

_GUICtrlMonthCal_GetFirstDOW

## Example

    #include "Extras\HelpFileInternals.au3"

    #include <GUIConstantsEx.au3>
    #include <GuiMonthCal.au3>
    #include <WindowsStylesConstants.au3>

    Example()

    Func Example()
        ; Create GUI
        GUICreate("Month Calendar Get/Set First DOW (v" & @AutoItVersion & ")", 420, 300)
        Local $idMonthCal = GUICtrlCreateMonthCal("", 4, 4, -1, -1, $WS_BORDER, 0x00000000)

        ; Create memo control
        _MemoCreate(4, 168, 412, 128, 0)
        GUISetState(@SW_SHOW)

        ; Get/Set first DOW
        _GUICtrlMonthCal_SetFirstDOW($idMonthCal, 0)
        _MemoWrite("First DOW : " & _GUICtrlMonthCal_GetFirstDOW($idMonthCal))

        ; Loop until the user exits.
        Do
        Until GUIGetMsg() = $GUI_EVENT_CLOSE
        GUIDelete()
    EndFunc   ;==>Example