Win32多窗口程序的创建

本例演示如何在Win32应用程序中创建多个窗口

// Win32LevelRail1.5.cpp : Defines the entry point for the application.//#include "stdafx.h"#include "Win32LevelRail1.5.h"#define MAX_LOADSTRING 100// Global Variables:HINSTANCE hInst;// current instanceTCHAR szTitle[MAX_LOADSTRING]={L"主窗口"};// The title bar textTCHAR szWindowClass[MAX_LOADSTRING];// the main window class nameTCHAR szTitle2[MAX_LOADSTRING] = {L"第二窗口"};TCHAR szWindowClass2[MAX_LOADSTRING] = {L"Submarine"};    // 第二个窗口类的类名HWND hWnd, hWnd2; // Forward declarations of functions included in this code module:ATOMMyRegisterClass(HINSTANCE hInstance);BOOLInitInstance(HINSTANCE, int);LRESULT CALLBACKWndProc(HWND, UINT, WPARAM, LPARAM);LRESULT CALLBACK    WndProc2(HWND, UINT, WPARAM, LPARAM);INT_PTR CALLBACKAbout(HWND, UINT, WPARAM, LPARAM);int APIENTRY _tWinMain(HINSTANCE hInstance,                     HINSTANCE hPrevInstance,                     LPTSTR    lpCmdLine,                     int       nCmdShow){UNREFERENCED_PARAMETER(hPrevInstance);UNREFERENCED_PARAMETER(lpCmdLine); // TODO: Place code here.MSG msg;HACCEL hAccelTable;// Initialize global stringsLoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);LoadString(hInstance, IDC_WIN32LEVELRAIL15, szWindowClass, MAX_LOADSTRING);MyRegisterClass(hInstance);// Perform application initialization:if (!InitInstance (hInstance, nCmdShow)){return FALSE;}hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WIN32LEVELRAIL15));// Main message loop:while (GetMessage(&msg, NULL, 0, 0)){if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)){TranslateMessage(&msg);DispatchMessage(&msg);}}return (int) msg.wParam;}////  FUNCTION: MyRegisterClass()////  PURPOSE: Registers the window class.////  COMMENTS:////    This function and its usage are only necessary if you want this code//    to be compatible with Win32 systems prior to the 'RegisterClassEx'//    function that was added to Windows 95. It is important to call this function//    so that the application will get 'well formed' small icons associated//    with it.//ATOM MyRegisterClass(HINSTANCE hInstance){WNDCLASSEX wcex,wcex2;//第一个窗口类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_WIN32LEVELRAIL15));wcex.hCursor= LoadCursor(NULL, IDC_ARROW);wcex.hbrBackground= (HBRUSH)(COLOR_WINDOW+1);wcex.lpszMenuName= MAKEINTRESOURCE(IDC_WIN32LEVELRAIL15);wcex.lpszClassName= szWindowClass;wcex.hIconSm= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));// 第二个窗口类的定义    wcex2.cbSize = sizeof(WNDCLASSEX);     wcex2.style            = CS_HREDRAW | CS_VREDRAW;    wcex2.lpfnWndProc    = (WNDPROC)WndProc2;    wcex2.cbClsExtra    = 0;    wcex2.cbWndExtra    = 0;    wcex2.hInstance        = hInstance;    wcex2.hIcon           = LoadIcon(hInstance, (LPCTSTR)IDI_WIN32LEVELRAIL15);    wcex2.hCursor        = LoadCursor(NULL, IDC_ARROW);    wcex2.hbrBackground    = (HBRUSH)(COLOR_WINDOW+1);    wcex2.lpszMenuName    = MAKEINTRESOURCE(IDC_WIN32LEVELRAIL15);    wcex2.lpszClassName    = szWindowClass2;    wcex2.hIconSm        = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);return (RegisterClassEx(&wcex)&&RegisterClassEx(&wcex2));}////   FUNCTION: InitInstance(HINSTANCE, int)////   PURPOSE: Saves instance handle and creates main window////   COMMENTS:////        In this function, we save the instance handle in a global variable and//        create and display the main program window.//BOOL InitInstance(HINSTANCE hInstance, int nCmdShow){   HWND hWnd;   hInst = hInstance; // Store instance handle in our global variable   //创建第一个窗口   hWnd = CreateWindow(szWindowClass, /*szTitle*/L"主窗口", WS_OVERLAPPEDWINDOW,      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);   //创建第二个窗口   hWnd2 = CreateWindow(szWindowClass2, /*szTitle2*/L"第二窗口", WS_OVERLAPPEDWINDOW,      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);     if (!hWnd || !hWnd2)   {      return FALSE;   }   ShowWindow(hWnd, nCmdShow);   UpdateWindow(hWnd);   ShowWindow(hWnd2, nCmdShow);   UpdateWindow(hWnd2);   return TRUE;}////  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)////  PURPOSE:  Processes messages for the main window.////  WM_COMMAND- process the application menu//  WM_PAINT- Paint the main window//  WM_DESTROY- post a quit message and return////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);// Parse the menu selections:switch (wmId){case IDM_HELP_ABOUT:DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);break;case IDM_FILE_EXIT:if(MessageBox(hWnd, L"确认离开程序", L"警告", MB_OKCANCEL)==IDOK){DestroyWindow(hWnd);}break;default:return DefWindowProc(hWnd, message, wParam, lParam);}break;case WM_PAINT:hdc = BeginPaint(hWnd, &ps);// TODO: Add any drawing code here...EndPaint(hWnd, &ps);break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hWnd, message, wParam, lParam);}return 0;}LRESULT CALLBACK WndProc2(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);// Parse the menu selections:switch (wmId){case IDM_HELP_ABOUT:DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);break;case IDM_FILE_EXIT:if(MessageBox(hWnd, L"确认离开窗口", L"警告", MB_OKCANCEL)==IDOK){DestroyWindow(hWnd);}break;default:return DefWindowProc(hWnd, message, wParam, lParam);}break;case WM_PAINT:hdc = BeginPaint(hWnd, &ps);// TODO: Add any drawing code here...EndPaint(hWnd, &ps);break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hWnd, message, wParam, lParam);}return 0;}// Message handler for about box.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;}

效果如下：