Date Time Picker Control Example

Date and time picker (DTP) controls have several styles that determine a control's appearance and behavior using the CreateWindowEx dwStyle parameter. A date and time picker (DTP) control sends notification messages when it receives user input. The parent of the control receives these notification messages in the form of WM_NOTIFY messages. The lParam contains a pointer to an NMHDR structure that contains the notification code and additional information.

To create a Date and Time Picker (DTP) control specify DATETIMEPICK_CLASS as the window class and register the class by specifying the ICC_DATE_CLASSES bit flag in the accompanying INITCOMMONCONTROLSEX structure.

#include <windows.h>
#include <commctrl.h>
#include <tchar.h>

#pragma comment(lib, "comctl32.lib")

void GetSelectedDate(HWND, HWND, HWND);

HWND DateHandle;
HWND TimeHandle;
HWND hStat;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
    WNDCLASSEX wc;
    MSG msg;

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = TEXT("myWindowClass");
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    RegisterClassEx(&wc);

    CreateWindowEx(
        WS_EX_CLIENTEDGE,
        TEXT("myWindowClass"),
        TEXT("Date and Time Picker"),
        WS_VISIBLE | WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        340,
        220,
        NULL,
        NULL,
        hInstance,
        NULL);

    while (GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd,
                         UINT msg,
                         WPARAM wParam,
                         LPARAM lParam)
{
    LPNMHDR lpNmHdr;

    switch (msg)
    {
        case WM_CREATE:
        {
            INITCOMMONCONTROLSEX icex;

            icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
            icex.dwICC = ICC_DATE_CLASSES;
            InitCommonControlsEx(&icex);

            // Date picker
            DateHandle = CreateWindowEx(
                0,
                DATETIMEPICK_CLASS,
                TEXT("DateTime"),
                WS_CHILD | WS_VISIBLE | WS_BORDER | DTS_SHOWNONE,
                20,
                50,
                220,
                25,
                hwnd,
                NULL,
                NULL,
                NULL);

            // Time picker
            TimeHandle = CreateWindowEx(
                0,
                DATETIMEPICK_CLASS,
                TEXT("DateTime"),
                WS_CHILD | WS_VISIBLE | WS_BORDER | DTS_TIMEFORMAT,
                20,
                10,
                90,
                25,
                hwnd,
                NULL,
                NULL,
                NULL);

            // Static output
            hStat = CreateWindow(
                TEXT("static"),
                TEXT(""),
                WS_CHILD | WS_VISIBLE,
                20,
                130,
                280,
                30,
                hwnd,
                NULL,
                NULL,
                NULL);

            ShowWindow(DateHandle, SW_SHOW);

            break;
        }

        case WM_NOTIFY:
        {
            lpNmHdr = (LPNMHDR)lParam;

            if (lpNmHdr->code == DTN_DATETIMECHANGE)
            {
                GetSelectedDate(DateHandle, TimeHandle, hStat);
            }

            break;
        }

        case WM_CLOSE:
            DestroyWindow(hwnd);
            break;

        case WM_DESTROY:
            PostQuitMessage(0);
            break;

        default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }

    return 0;
}

void GetSelectedDate(HWND hMonthCal,
                     HWND TimeHandle,
                     HWND hStat)
{
    SYSTEMTIME time;
    const int dsize = 80;

    TCHAR buf[dsize];
    TCHAR date[dsize];

    ZeroMemory(&time, sizeof(SYSTEMTIME));

    // Read selected date
    SendMessage(hMonthCal,
                DTM_GETSYSTEMTIME,
                0,
                (LPARAM)&time);

    wsprintf(date,
             TEXT("Selected date: %d-%d-%d"),
             time.wDay,
             time.wMonth,
             time.wYear);

    // Read selected time
    SendMessage(TimeHandle,
                DTM_GETSYSTEMTIME,
                0,
                (LPARAM)&time);

    wsprintf(buf,
             TEXT("  Selected time: %d-%d-%d"),
             time.wHour,
             time.wMinute,
             time.wSecond);

    _tcscat(date, buf);

    SetWindowText(hStat, date);
}