#include <GUIConstantsEx.au3>
#include <GuiMonthCal.au3>
#include <WinAPIMisc.au3>
#include <WindowsConstants.au3>

Global $g_idMonthCal, $g_idMemo, $g_hGUI

Example()

Func Example()
        ; Create GUI
        $g_hGUI = GUICreate("Month Calendar Hit Test (v" & @AutoItVersion & ")", 400, 300)
        $g_idMonthCal = GUICtrlCreateMonthCal("", 4, 4, -1, -1, $WS_BORDER, 0x00000000)

        ; Create memo control
        $g_idMemo = GUICtrlCreateEdit("", 4, 168, 392, 128, $WS_VSCROLL)
        GUICtrlSetFont($g_idMemo, 9, 400, 0, "Courier New")
        GUISetState(@SW_SHOW)

        ; Loop until the user exits.
        While 1
                Switch GUIGetMsg()
                        Case $GUI_EVENT_MOUSEMOVE
                                DoHitTest()
                        Case $GUI_EVENT_CLOSE
                                ExitLoop
                EndSwitch
        WEnd
        GUIDelete()
EndFunc   ;==>Example

; Perform hit test
Func DoHitTest()
        Local $tHit

        $tHit = _GUICtrlMonthCal_HitTest($g_idMonthCal, _WinAPI_GetMousePosX(True, $g_hGUI), _WinAPI_GetMousePosY(True, $g_hGUI))
        If BitAND(DllStructGetData($tHit, "Hit"), $MCHT_CALENDARDATE) <> 0 Then
                MemoWrite("Date: " & StringFormat("%02d/%02d/%04d", DllStructGetData($tHit, "Month"), _
                                DllStructGetData($tHit, "Day"), _
                                DllStructGetData($tHit, "Year")))
        EndIf
EndFunc   ;==>DoHitTest

; Write message to memo
Func MemoWrite($sMessage)
        GUICtrlSetData($g_idMemo, $sMessage & @CRLF, 1)
EndFunc   ;==>MemoWrite