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2Project3.cpp : 定义应用程序的入口点。
//
#include "stdafx.h"
#include "Win32Project3.h"
#define MAX_LOADSTRING 100
// 全局变量:
HINSTANCE hInst; // 当前实例
TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
// 此代码模块中包含的函数的前向声明:
HWND hWnd,hWnd1,hWnd2;
//TCHAR La=TCHAR("LOVE");
TCHAR szname[]=TEXT("classname"); ////////////////第二个类的类名//////////
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc1(HWND, UINT, WPARAM, LPARAM);/////****第二个类的窗口处理函数**
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPTSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// TODO: 在此放置代码。
MSG msg;
HACCEL hAccelTable;
// 初始化全局字符串
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_WIN32PROJECT3, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// 执行应用程序初始化:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WIN32PROJECT3));
// 主消息循环:
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
//
// 函数: MyRegisterClass()
//
// 目的: 注册窗口类。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WIN32PROJECT3));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCE(IDC_WIN32PROJECT3);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
////////////////////////
//wcex2.cbSize = sizeof(WNDCLASSEX);
WNDCLASSEX wcex2a;
wcex2a.cbSize = sizeof(WNDCLASSEX);
wcex2a.style = CS_HREDRAW | CS_VREDRAW;
wcex2a.lpfnWndProc = WndProc1;
wcex2a.cbClsExtra = 0;
wcex2a.cbWndExtra = 0;
wcex2a.hInstance = hInstance;
wcex2a.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WIN32PROJECT3));
wcex2a.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex2a.hbrBackground = (HBRUSH)(COLOR_WINDOW+4);///////此处画刷不同
wcex2a.lpszMenuName = MAKEINTRESOURCE(IDC_WIN32PROJECT3);
wcex2a.lpszClassName = szname;///////类名不同//////
wcex2a.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
if(!RegisterClassEx(&wcex2a))//////////如果注册失败会弹出对话框
{
MessageBox(hWnd,L"为什么？",L"",MB_OK);
}
return (RegisterClassEx(&wcex));//&&RegisterClassEx(&wcex2a));
}
//
// 函数: InitInstance(HINSTANCE, int)
//
// 目的: 保存实例句柄并创建主窗口
//
// 注释:
//
// 在此函数中，我们在全局变量中保存实例句柄并
// 创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd，hWnd1,hWnd2;
hInst = hInstance; // 将实例句柄存储在全局变量中
hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);///原本的窗口
hWnd1 = CreateWindow(szname, L"不同类", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);//新类的窗口
hWnd2 = CreateWindow(szWindowClass, L"同一个类", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);///旧类的2号窗口
if (!hWnd||!hWnd2)//||!hWnd1)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
ShowWindow(hWnd1, nCmdShow);
UpdateWindow(hWnd1);
ShowWindow(hWnd2, nCmdShow);
UpdateWindow(hWnd2);
return TRUE;
}
//
// 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// 目的: 处理主窗口的消息。
//
// WM_COMMAND - 处理应用程序菜单
// WM_PAINT - 绘制主窗口
// WM_DESTROY - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
switch (message)
{
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// 分析菜单选择:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: 在此添加任意绘图代码...
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
// “关于”框的消息处理程序。
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
UNREFERENCED_PARAMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return (INT_PTR)TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
}
LRESULT CALLBACK WndProc1(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
switch (message)
{
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// 分析菜单选择:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: 在此添加任意绘图代码...
EndPaint(hWnd, &ps);
break;
case WM_DESTROY://////为了加以区别，我们队该消息做了改动
//PostQuitMessage(0);
MessageBox(hWnd,L"我先走了，和你们不一样",L"NOTE",MB_OK);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}运行结果
MFC应用程序的完整退出过程：点击窗口右上角的关闭按钮，或选择【File/Close】，发出 WM_CLOSE消息。CMyFrameWnd 并没有设置WM_CLOSE 处理常式，于是交给预设之处理常式。预设函数对于WM_CLOSE 的处理方式是呼叫 ::DestroyWindow， 并因而发出WM_DESTROY。预设之WM_DESTROY 处理方式是呼叫::PostQuitMessage，因此发出WM_QUIT。CWinApp::Run 收到WM_QUIT 后会结束其内部之讯息回路， 然后呼叫ExitInstance，这是CWinApp 的一个虚拟函数。如果自己应用程序类CMyWinApp 改写了ExitInstance ， 那么CWinApp::Run 所呼叫的就是CMyWinApp::ExitInstance，否则就是 CWinApp::ExitInstance。最后回到 AfxWinMain，执行 AfxWinTerm，结束程序。标签：
原文地址：http://blog.csdn.net/q__y__l/article/details/51347536
