第一个Win32应用程序

      工程：
            
    

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     WinMain.h

#ifndef _WINMAIN_H_
#define _WINMAIN_H_

#include <windows.h>

#define SCREEN_WIDTH 600
#define SCREEN_HEIGHT 400

/************************************************************************/
/* WinApplication窗口回调函数 */
/************************************************************************/
LRESULT CALLBACK WinLesson1Pro(
    _In_  HWND hwnd,
    _In_  UINT uMsg,
    _In_  WPARAM wParam,
    _In_  LPARAM lParam
    );

/************************************************************************/
/* 消息提示框+处理事件 */
/************************************************************************/
int DisplayMessageBox(HWND hwnd, char * lpText, char * lpCaption, UINT uType);

#endif    //_WINMAIN_H_

    WinMain.cpp

#include "WinMain.h"
#include <stdio.h>

int WINAPI WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    /*LPWSTR*/LPSTR lpCmdLine,
    int nShowCmd
    )
{
    WNDCLASS wndcls;

    ///< 构造窗体类
    wndcls.cbClsExtra = 0;
    wndcls.cbWndExtra = 0;
    wndcls.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
    wndcls.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndcls.hIcon = LoadIcon(NULL, IDI_WINLOGO);
    wndcls.hInstance = hInstance;
    wndcls.lpfnWndProc = WinLesson1Pro;
    wndcls.lpszClassName = "lesson1";
    wndcls.lpszMenuName = NULL;
    wndcls.style = CS_HREDRAW | CS_VREDRAW;

    ///< 注册窗体
    RegisterClass(&wndcls);

    ///< 创建窗口
    HWND hwnd;
    hwnd = CreateWindow("lesson1", "小豆第一课学习",
        WS_OVERLAPPEDWINDOW, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
        NULL, NULL, hInstance, NULL);
    if (!hwnd)
    {
        return -1;
    }

    ///< 显示窗口
    ShowWindow(hwnd, SW_SHOWNORMAL);

    ///< 更新窗口
    UpdateWindow(hwnd);

    MSG msg;
    ///< 消息循环
    while(GetMessage(&msg, hwnd, 0, 0) > 0)
    {
        TranslateMessage(&msg);        ///< 转换消息
        DispatchMessage(&msg);         ///< 分发消息【消息被分发到回调函数（过程函数)】
    }

    return 0;
}

LRESULT CALLBACK WinLesson1Pro(
    _In_  HWND hwnd,
    _In_  UINT uMsg,
    _In_  WPARAM wParam,
    _In_  LPARAM lParam
    )
{
    HDC hdc;
    char szChar[20];

    switch (uMsg)
    {
    case WM_CHAR:
        // The keyboard.
        sprintf(szChar, "char is %c", wParam);
        DisplayMessageBox(hwnd, szChar, "消息", 0);
        break;

    case WM_LBUTTONDOWN:
        // The left mouse button.
        DisplayMessageBox(hwnd, "The left mouse clicked", "鼠标左键", 0);
        ///< Text out
        hdc = GetDC(hwnd);
        TextOut(hdc, 0, 50, "文字", strlen("文字"));
        ReleaseDC(hwnd, hdc);
        break;

    case WM_RBUTTONDOWN:
        // The right mouse button.
        break;

    case WM_CLOSE:
        // Close the window.
        if (IDYES == DisplayMessageBox(hwnd, "是否结束?", "关闭", MB_YESNO))
        {
            DestroyWindow(hwnd);
            return 0;
        }
        break;

    case WM_CREATE:
        // Initialize the window.
        //DisplayResourceNAMessageBox(hwnd, "创建", "WM_CREATE", MB_HELP);
        return 0;

    case WM_PAINT:
        // Paint the window's client area.
        PAINTSTRUCT ptruct;
        hdc = BeginPaint(hwnd, &ptruct);
        TextOut(hdc, 0, 0, "绘制", strlen("绘制"));
        EndPaint(hwnd, &ptruct);
        return 0;

    case WM_SIZE:
        // Set the size and position of the window.
        //DisplayResourceNAMessageBox(hwnd, "大小", "WM_SIZE", MB_HELP);
        return 0;

    case WM_DESTROY:
        // Clean up window-specific data objects.
        PostQuitMessage(0);
        return 0;

    default:
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }
    return 0;
}

int DisplayMessageBox(HWND hwnd, char * lpText, char * lpCaption, UINT uType)
{
    int msgboxID = MessageBox(hwnd, lpText, lpCaption, uType);

    switch (msgboxID)
    {
    case IDCANCEL:
        // TODO: add code
        break;
    case IDTRYAGAIN:
        // TODO: add code
        break;
    case IDCONTINUE:
        // TODO: add code
        break;
    }

    return msgboxID;
}

   

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