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  • [C语言](一)第一个Windows 32 API的窗口程序

    #include <windows.h>
    
    LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
    
    int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int ICmdShow) {
        static TCHAR szAppName[] = TEXT("windowOfC");
    
        HWND hwnd;//窗体句柄变量
        MSG msg;//消息变量
        WNDCLASS wndclass;//窗口类变量
    
        //配置窗口类结构
        wndclass.style = CS_HREDRAW | CS_VREDRAW;
        wndclass.lpfnWndProc = WndProc;
        wndclass.cbClsExtra = 0;
        wndclass.cbWndExtra = 0;
        wndclass.hInstance = hInstance;
        wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
        wndclass.hbrBackground = (HBRUSH)COLOR_WINDOW;
        wndclass.lpszMenuName = NULL;
        wndclass.lpszClassName = szAppName;
    
        //注册窗口类
        if (!RegisterClass(&wndclass)) {
            MessageBox(NULL, TEXT("注册窗口类失败!"), szAppName, MB_ICONERROR);
            return 0;
        }
    
        hwnd = CreateWindow(szAppName,
            TEXT("C语言调用Windows API创建的窗口"),
            WS_OVERLAPPEDWINDOW,
            CW_USEDEFAULT,
            CW_USEDEFAULT,
            CW_USEDEFAULT,
            CW_USEDEFAULT,
            NULL,
            NULL,
            hInstance,
            NULL);
    
        ShowWindow(hwnd, ICmdShow);
        UpdateWindow(hwnd);
    
        while (GetMessage(&msg, NULL, 0, 0)) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    
        return msg.wParam;
    };
    
    //消息处理方法,windows操作系统的回调函数
    LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
        HDC hdc;
        PAINTSTRUCT ps;
        RECT rect;
    
        switch (message) {
        case WM_CREATE:
            MessageBox(NULL, TEXT("创建窗口了!"), NULL, MB_ICONERROR);
            return 0;
        case WM_PAINT:
            hdc = BeginPaint(hwnd, &ps);
            GetClientRect(hwnd, &rect);
            DrawText(hdc, TEXT("hello C windows "), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
            EndPaint(hwnd, &ps);
            return 0;
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
        }
    
        return DefWindowProc(hwnd, message, wParam, lParam);
    };
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  • 原文地址:https://www.cnblogs.com/sunylat/p/6218871.html
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