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//: 這裡我為大家加上了中文註解,比較容易讀懂程式碼。
#include "stdafx.h"
#include "HelloWin32SDK.h"
#define MAX_LOADSTRING 100
// 全域變數
HINSTANCE hInst; // 視窗實體變數
TCHAR szTitle[MAX_LOADSTRING]; // 視窗標題列
TCHAR szWindowClass[MAX_LOADSTRING]; // 主視窗類別
// 向前宣告
ATOM MyRegisterClass(HINSTANCE hInstance); //註冊視窗
BOOL InitInstance(HINSTANCE, int); //初始化變數群
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); //視窗訊息處理函示
LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM); //「關於」視窗的處理函示
/*視窗程式的進入點,舊版的SDK寫法為:
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{...}
*/
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
MSG msg;
HACCEL hAccelTable;
// 初始化全域變數(字串)
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_HELLOWIN32SDK, szWindowClass, MAX_LOADSTRING);
// 註冊視窗
MyRegisterClass(hInstance);
// 處理應用程式的初始化
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_HELLOWIN32SDK);
// 訊息迴圈
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
//
// 函數: MyRegisterClass()
//
// 目的: 註冊視窗類別
//
// 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.
//
// 這是新版的視窗類別結構 WNDCLASSEX ,這個結構只比舊的WNDCLASS多了兩個資料成員。
// 一個為 cbSize 用來計算結構大小,另外一個 hIconSm 記錄視窗縮小化後的大小。
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
//視窗樣式
wcex.style = CS_HREDRAW | CS_VREDRAW;
//訊息處理函數
wcex.lpfnWndProc = (WNDPROC)WndProc;
//額外要求註冊視窗所需要的記憶體(byte)
wcex.cbClsExtra = 0;
//額外要求生成視窗所需要的記憶體(byte)
wcex.cbWndExtra = 0;
//包含處理這個視窗類別的訊息處理程式的 HANDLE。
wcex.hInstance = hInstance;
//視窗圖示
wcex.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_HELLOWIN32SDK);
//視窗中使用的游標
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
//視窗的背景
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
/*
背景可以是事先定義好的色彩常數。
COLOR_ACTIVEBORDER
COLOR_ACTIVECAPTION
COLOR_APPWORKSPACE
COLOR_BACKGROUND
COLOR_BTNFACE
COLOR_BTNSHADOW
COLOR_BTNTEXT
COLOR_CAPTIONTEXT
COLOR_GRAYTEXT
COLOR_HIGHLIGHT
COLOR_HIGHLIGHTTEXT
COLOR_INACTIVEBORDER
COLOR_INACTIVECAPTION
COLOR_MENU
COLOR_MENUTEXT
COLOR_SCROLLBAR
COLOR_WINDOW
COLOR_WINDOWFRAME
COLOR_WINDOWTEXT
*/
//功能表
wcex.lpszMenuName = (LPCTSTR)IDC_HELLOWIN32SDK;
//註冊視窗的字串
wcex.lpszClassName = szWindowClass;
//視窗最小化後的ICON
wcex.hIconSm = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);
//舊版的 WNDCLASS 需改用 RegisterClass 函數。
return RegisterClassEx(&wcex);
}
//
// FUNCTION: InitInstance(HANDLE, 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.
//
// 記住視窗程式的記憶位置實體
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;
// 將 Instance Handle 放置到全域變數
hInst = hInstance;
// 建立視窗
hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
// 判斷視窗建立是否成功
if (!hWnd)
{
return FALSE;
}
// 顯示視窗
ShowWindow(hWnd, nCmdShow);
// 更新視窗
UpdateWindow(hWnd);
return TRUE;
}
//
// FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - 處理視窗的功能表
// WM_PAINT - 繪製視窗的訊息代號
// WM_DESTROY - 結束視窗
//
// ☆這個函數是用來處理所有的視窗事件。(主視窗)
//
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:
//顯示「關於」對話視窗,最後一個參數是該對話視窗的事件處理函數。
DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
break;
case IDM_EXIT:
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.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return TRUE;
}
break;
}
return FALSE;
} |
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