hello-world.cpp

#include <windows.h>

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

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    WNDCLASSEXW wcex;
    HWND hWnd;
    MSG msg;

    wcex.cbSize = sizeof(WNDCLASSEXW);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hIcon = LoadIcon(hInstance, IDI_APPLICATION);
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = L"TestWindowClass";
    wcex.hIconSm = LoadIcon(wcex.hInstance, IDI_APPLICATION);

    if (!RegisterClassExW(&wcex)) {
        MessageBoxW(NULL, L"窗口类注册失败", L"错误", MB_OK | MB_ICONERROR);
        return 0;
    }

    const wchar_t* windowTitle = L"csv 转 ClassWidgets json 课表转换器";
    hWnd = CreateWindowExW(0, L"TestWindowClass", windowTitle, WS_OVERLAPPEDWINDOW,
                           CW_USEDEFAULT, 0, 550, 300, NULL, NULL, hInstance, NULL);

    if (!hWnd) {
        MessageBoxW(NULL, L"窗口创建失败", L"错误", MB_OK | MB_ICONERROR);
        return 0;
    }

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

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

    return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
    switch (message) {
        case WM_DESTROY:
            PostQuitMessage(0);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}