Call back for calendar? WINAPI

[danielmccarthy]

I have made a calendar using a resource file and using the winapi

CALENDAR_DLG DIALOG 0, 0, 186, 95
STYLE DS_3DLOOK | DS_CENTER | DS_MODALFRAME | DS_SHELLFONT | WS_CAPTION | WS_VISIBLE | WS_POPUP | WS_SYSMENU
CAPTION "Calendar"
FONT 8, "Ms Shell Dlg"
{
    CONTROL "", CALENDAR, "SysMonthCal32", WS_VISIBLE, 0, 0, 186, 95
}

My call back function is

BOOL CALLBACK DlgCalendar(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
        case WM_INITDIALOG:
        {

        }
        return TRUE;

        case WM_CLOSE:
        {
            EndDialog(hwndDlg, 0);
        }
        return TRUE;

        case DTN_DATETIMECHANGE:
        {
            exit(5);
        }
    }

    return FALSE;
}

DTN_DATETIMECHANGE is not being called ? What is UMSG equal to when a date is changed in the calendar?

Many thanks

[coder777]

uMsg is WM_NOTIFY:

http://msdn.microsoft.com/en-us/library/windows/desktop/bb761737%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/bb775583%28v=vs.85%29.aspx

wParam contains the DTN_DATETIMECHANGE identifier

[danielmccarthy]

You got the WM_NOTIFY bit right but wParam is not equal to DTN_DATETIMECHANGE when I choose another date. the entire variable the lower bits or the higher bits none are equal to this value.

I did how ever find some research about the lParam so I wrote some code but it did not work either..

BOOL CALLBACK DlgCalendar(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
        case WM_NOTIFY:
        {
            switch(((LPNMHDR)lParam)->code)
            {
                case DTN_DATETIMECHANGE:
                {
                    HWND _calendar;
                    SYSTEMTIME calTime;
                    stringstream ss;
                    _calendar = GetDlgItem(hwndDlg, CALENDAR);
                    MonthCal_GetCurSel(_calendar, (LPSYSTEMTIME)&calTime);
                    ss << "Confirm date: " << calTime.wDay << "/" << calTime.wMonth << "/" << calTime.wYear;
                    int a = MessageBoxA(0, ss.str().c_str(), "", MB_YESNO);
                    if (a == IDYES)
                    {
                        calendarSelDate = calTime;
                        calendarSelection = true;
                        EndDialog(hwndDlg, 0);
                    }
                }
            }
        }

        case WM_INITDIALOG:
        {

        }
        return TRUE;

        case WM_CLOSE:
        {
            EndDialog(hwndDlg, 0);
        }
        return TRUE;

        case DTN_DATETIMECHANGE:
        {
            exit(5);
        }
    }

    return FALSE;
}

Anyone know what I am doing wrong?

[danielmccarthy]

bump-

[danielmccarthy]

bump --

[coder777]

Take a look at this:

http://msdn.microsoft.com/en-us/library/aa922124.aspx

It's not quite clear where DTN_DATETIMECHANGE appears. Maybe try the idFrom member