WIN32 Application Demo

// Win32.cpp : Defines the entry point for the application.//#include "stdafx.h"#include "Win32.h"#define MAX_LOADSTRING 100// Global Variables:HINSTANCE hInst;// current global instanceTCHAR szTitle[MAX_LOADSTRING];// The title bar textTCHAR szWindowClass[MAX_LOADSTRING];// the main window class name// Forward declarations of functions included in this code module:ATOMMyRegisterClass(HINSTANCE hInstance);// register for a windowBOOLInitInstance(HINSTANCE, int);// create windowLRESULT CALLBACKWndProc(HWND, UINT, WPARAM, LPARAM);// a application-defined function that processes messages sent to a windowINT_PTR CALLBACKAbout(HWND, UINT, WPARAM, LPARAM);int APIENTRY _tWinMain(HINSTANCE hInstance,// current instance； HINSTANCE hPrevInstance,// NULL LPTSTR lpCmdLine,// command parameter int nCmdShow)// specifics how the window is to be shown{UNREFERENCED_PARAMETER(hPrevInstance);// UNREFERENCED_PARAMETER(): the parameter which is not used, warning;UNREFERENCED_PARAMETER(lpCmdLine); // TODO: Place code here.MSG msg;HACCEL hAccelTable;// Initialize global stringsLoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);LoadString(hInstance, IDC_WIN32, szWindowClass, MAX_LOADSTRING);// use resource defined stringMyRegisterClass(hInstance);// register for a window// Perform application initialization:if (!InitInstance (hInstance, nCmdShow)){return FALSE;}hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WIN32));// Main message loop:while (GetMessage(&msg, NULL, 0, 0)){if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)){TranslateMessage(&msg);// translate virtual-key messages into character messages;DispatchMessage(&msg);// dispatch a message to a window procedure}}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;wcex.cbSize = sizeof(WNDCLASSEX);wcex.style= CS_HREDRAW | CS_VREDRAW;// always be CS_HREDRAW | CS_VREDRAWwcex.lpfnWndProc= WndProc;// a application-defined function that processes messages sent to a windowwcex.cbClsExtra= 0;// always be NULLwcex.cbWndExtra= 0;// always be NULLwcex.hInstance= hInstance;// current instancewcex.hIcon= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WIN32));// use resource defined iconwcex.hCursor= LoadCursor(NULL, IDC_ARROW);// change cursor style functionwcex.hbrBackground= (HBRUSH)(COLOR_WINDOW+1);wcex.lpszMenuName= MAKEINTRESOURCE(IDC_WIN32);// use resource defined menu; wcex.lpszClassName= szWindowClass;// window class namewcex.hIconSm= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));// use resource defined iconreturn RegisterClassEx(&wcex);// the return value is a class atom that uniquely identifies the class being registered}//// 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 // CreateWindow: define your personal window, modify the window's style here hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); if (!hWnd) { return FALSE; } ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd);// send a WM_PAINT message to the window; 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_ABOUT:DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);break;case IDM_EXIT://DestroyWindow(hWnd);PostQuitMessage(0);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;}