控件–MonthCalendar

使用WindowsAPI，创建MonthCalendar控件：

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

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

#define ID_CALENDAR 101

LRESULT CALLBACK WindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
    switch (message) {
    case WM_CREATE: {
        // 创建 MonthCalendar 控件
        HWND hwndCalendar = CreateWindowEx(0, MONTHCAL_CLASS, NULL,
            WS_CHILD | WS_VISIBLE | WS_BORDER,
            10, 10, 200, 200, // x, y, width, height
            hwnd, (HMENU)ID_CALENDAR, NULL, NULL);

        break;
    }
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    // 初始化 Common Controls
    INITCOMMONCONTROLSEX icex;
    icex.dwSize = sizeof(icex);
    icex.dwICC = ICC_DATE_CLASSES; // 初始化日期控件类
    InitCommonControlsEx(&icex);

    // 创建窗口类
    WNDCLASS wc = {};
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = L"MonthCalendarExample";
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);

    RegisterClass(&wc);

    // 创建窗口
    HWND hwnd = CreateWindowEx(
        0, L"MonthCalendarExample", L"MonthCalendar Control Example",
        WS_OVERLAPPEDWINDOW | WS_VISIBLE,
        CW_USEDEFAULT, CW_USEDEFAULT, 300, 250,
        NULL, NULL, hInstance, NULL);

    // 消息循环
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0) > 0) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int)msg.wParam;
}

效果图：