Win32HellowWorld.cpp

#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <tchar.h>

static TCHAR szWindowClass[] = _T("win32app");
static TCHAR szTitle[] = _T("win32 guided tour application");
HINSTANCE hInst;


//窗口过程函数
LRESULT CALLBACK WndProc(HWND hWnd,        //handle to window
                         UINT message,    //message identifier
                         WPARAM wParam,
                         LPARAM lParam)
{
    PAINTSTRUCT ps;
    HDC hdc;
    TCHAR greeting[] = _T("Hellow world!");

    switch(message)
    {
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        TextOut(hdc,
            5, 5,
            greeting, _tcslen(greeting));
        
        EndPaint(hWnd, &ps);
        break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
        break;
    }

    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    //设计窗口类
    WNDCLASSEX wcex;

    wcex.cbSize             = sizeof(WNDCLASSEX);                // 定义结构体大小
    wcex.style             = CS_HREDRAW | CS_VREDRAW;            //类的类型
    wcex.lpfnWndProc = WndProc;        //指向窗口过程函数的指针
    wcex.cbClsExtra         = 0;            //类附加内存
    wcex.cbWndExtra         = 0;            //窗口附加内存
    wcex.hInstance         = hInstance;    //应用程序实例句柄
    wcex.hCursor     = LoadCursor(NULL, IDC_ARROW);        //光标句柄
    wcex.hIcon             = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));        //图标句柄
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);    //背景画刷
    wcex.lpszClassName = szWindowClass;                //
    wcex.lpszMenuName     = NULL;                        //
    wcex.hIconSm         = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));    //

    //注册 
    if(!RegisterClassEx(&wcex))
    {
        MessageBox(NULL,
            _T("call to registerclassex failed!"),
            _T("win32 guided tour"),
            NULL);
        return 1;
    }

    hInst = hInstance;

    //创建窗口
    HWND hWnd = CreateWindow(
        szWindowClass,            //the name of the application
        szTitle,                //the text that appears in the title bar
        WS_OVERLAPPEDWINDOW,    //the type of window to create
        CW_USEDEFAULT, CW_USEDEFAULT, //initial position 
        500, 100,                //initial size
        NULL,                    //the parent of this window
        NULL,                    //this application does not have a menu bar
        hInstance,                //the first parameter form winMain
        NULL                    //not used in this application
        );

    
    if(!hWnd)
    {
        MessageBox(NULL,
            _T("call to createwindow failed!"),
            _T("win32 guided tour"),
            NULL);

        return 1;
    }

    //显示及刷新
    ShowWindow(hWnd,    //the value returned from CreateWindow
        nCmdShow);        //the fourth parameter from WinMain

    UpdateWindow(hWnd);
    
    //消息循环
    MSG msg;
    while(GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int) msg.wParam;

}