Win32 API教程（1）

#include <windows.h>

const char g_szClassName[] = "myWindowClass";//储存窗口类的名字

// Step 4: the Window Procedure（窗口过程）
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch(msg)
    {
                case WM_LBUTTONDOWN:
// BEGIN NEW CODE
        {
            char szFileName[MAX_PATH];
            HINSTANCE hInstance = GetModuleHandle(NULL);

            GetModuleFileName(hInstance, szFileName, MAX_PATH);
            MessageBox(hwnd, szFileName, "This program is:", MB_OK | MB_ICONINFORMATION);
        // X错误 MB_ICONHAND, MB_ICONSTOP, and MB_ICONERROR
        // ?询问 MB_ICONQUESTION
        // !警告 MB_ICONEXCLAMATION and MB_ICONWARNING
        // i信息 MB_ICONASTERISK and MB_ICONINFORMATION
        }
// END NEW CODE
        break;
        //窗口关闭
        case WM_CLOSE:
            ///MessageBox(NULL, "Do you want close it?", "warm!",MB_ICONQUESTION | MB_YESNO);
            ///对YES/NO的不同处理？？？if/else
            DestroyWindow(hwnd);
        break;
        case WM_DESTROY:
            PostQuitMessage(0);
        break;
        default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}

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

    //Step 1: Registering the Window Class(注册窗口类)
    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 = g_szClassName;
    wc.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

    if(!RegisterClassEx(&wc))//注册窗口失败
    {
        MessageBox(NULL, "Window Registration Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    // Step 2: Creating the Window(创建窗口)
    hwnd = CreateWindowEx(
        WS_EX_CLIENTEDGE,
        g_szClassName,      //设置类的名字
        "The title of my window",       //窗口左上方的名字
        WS_OVERLAPPEDWINDOW,        //窗口式样参数
        CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,     //窗口位置和大小
        NULL, NULL, hInstance, NULL);

    if(hwnd == NULL)        //检查返回值
    {
        MessageBox(NULL, "Window Creation Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

ShowWindow(hwnd, nCmdShow); //显示窗口
UpdateWindow(hwnd);

    // Step 3: The Message Loop(消息循环)
    while(GetMessage(&Msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
    return Msg.wParam;

}

猜你喜欢