怎样在win32下用c完成vc中的日历控件的功能（不用类）

msdn:Date and time picker controls are implemented in version 4.70 and later of Comctl32.dll. To create a DTP control call CreateWindowEx and specify DATETIMEPICK_CLASS as the window class. The class is registered when the date and time picker class is loaded from the common control dynamic-link library (DLL). Register this class by calling the InitCommonControlsEx function, while specifying the ICC_DATE_CLASSES bit flag in the accompanying INITCOMMONCONTROLSEX structure. 
///////////////////////////////////
HWND WINAPI CreateDatePick(hwndMain)
{
    HWND hwndDP = NULL;
    HWND hwndDlg = NULL;
    INITCOMMONCONTROLSEX icex;    icex.dwSize = sizeof(icex);
    icex.dwICC = ICC_DATE_CLASSES;    InitCommonControlsEx(&icex);    hwndDlg = CreateDialog  (g_hinst,
                             MAKEINTRESOURCE(IDD_DIALOG1),
                             hwndMain,
                             DlgProc);    if(hwnDlg)
        hwndDP = CreateWindowEx(0,
                             DATETIMEPICK_CLASS,
                             "DateTime",
                             WS_BORDER|WS_CHILD|WS_VISIBLE|DTS_SHOWNONE,
                             20,50,220,20,
                             hwndDlg,
                             NULL,
                             g_hinst,
                             NULL);
    return (hwndDP);
}