1 // 01WM_PAINT与GetDC.cpp : 定义应用程序的入口点。
2 //
3
4 #include "stdafx.h"
5 #include "01WM_PAINT与GetDC.h"
6
7 #define MAX_LOADSTRING 100
8
9 #define MYBUTTON1 10001
10
11 #define MYBUTTON2 10002
12
13 #define MYBUTTON3 10003
14 // 全局变量:
15 HINSTANCE hInst; // 当前实例
16 TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
17 TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
18
19 // 此代码模块中包含的函数的前向声明:
20 ATOM MyRegisterClass(HINSTANCE hInstance);
21 BOOL InitInstance(HINSTANCE, int);
22 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
23 INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
24
25 int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
26 _In_opt_ HINSTANCE hPrevInstance,
27 _In_ LPTSTR lpCmdLine,
28 _In_ int nCmdShow)
29 {
30 UNREFERENCED_PARAMETER(hPrevInstance);
31 UNREFERENCED_PARAMETER(lpCmdLine);
32
33 // TODO: 在此放置代码。
34 MSG msg;
35 HACCEL hAccelTable;
36
37 // 初始化全局字符串
38 LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
39 LoadString(hInstance, IDC_MY01WM_PAINTGETDC, szWindowClass, MAX_LOADSTRING);
40 MyRegisterClass(hInstance);
41
42 // 执行应用程序初始化:
43 if (!InitInstance (hInstance, nCmdShow))
44 {
45 return FALSE;
46 }
47
48 hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_MY01WM_PAINTGETDC));
49
50 // 主消息循环:
51 while (GetMessage(&msg, NULL, 0, 0))
52 {
53 if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
54 {
55 TranslateMessage(&msg);
56 DispatchMessage(&msg);
57 }
58 }
59
60 return (int) msg.wParam;
61 }
62
63
64
65 //
66 // 函数: MyRegisterClass()
67 //
68 // 目的: 注册窗口类。
69 //
70 ATOM MyRegisterClass(HINSTANCE hInstance)
71 {
72 WNDCLASSEX wcex;
73
74 wcex.cbSize = sizeof(WNDCLASSEX);
75
76 wcex.style = CS_HREDRAW | CS_VREDRAW;
77 wcex.lpfnWndProc = WndProc;
78 wcex.cbClsExtra = 0;
79 wcex.cbWndExtra = 0;
80 wcex.hInstance = hInstance;
81 wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_MY01WM_PAINTGETDC));
82 wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
83 wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
84 wcex.lpszMenuName = MAKEINTRESOURCE(IDC_MY01WM_PAINTGETDC);
85 wcex.lpszClassName = szWindowClass;
86 wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
87
88 return RegisterClassEx(&wcex);
89 }
90
91 //
92 // 函数: InitInstance(HINSTANCE, int)
93 //
94 // 目的: 保存实例句柄并创建主窗口
95 //
96 // 注释:
97 //
98 // 在此函数中，我们在全局变量中保存实例句柄并
99 // 创建和显示主程序窗口。
100 //
101 BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
102 {
103 HWND hWnd;
104
105 hInst = hInstance; // 将实例句柄存储在全局变量中
106
107 hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
108 CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
109
110 if (!hWnd)
111 {
112 return FALSE;
113 }
114
115 ShowWindow(hWnd, nCmdShow);
116 UpdateWindow(hWnd);
117
118 return TRUE;
119 }
120
121 //
122 // 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
123 //
124 // 目的: 处理主窗口的消息。
125 //
126 // WM_COMMAND - 处理应用程序菜单
127 // WM_PAINT - 绘制主窗口
128 // WM_DESTROY - 发送退出消息并返回
129 //
130 //
131 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
132 {
133 int wmId, wmEvent;
134 PAINTSTRUCT ps;
135 HDC hdc;
136 static int nNum = 10;
137 switch (message)
138 {
139 case WM_CREATE:
140 //创建按钮用于GetDC()
141 CreateWindow(
142 TEXT("button"),
143 TEXT("hehe"),
144 WS_VISIBLE | WS_CHILD,
145 50, 50, 60, 30, hWnd,
146 (HMENU)MYBUTTON1,
147 hInst,
148 NULL);
149 //创建按钮用于GetWindowDC()
150 CreateWindow(
151 TEXT("button"),
152 TEXT("hehe"),
153 WS_VISIBLE | WS_CHILD,
154 120, 50, 60, 30, hWnd,
155 (HMENU)MYBUTTON2,
156 hInst,
157 NULL);
158 CreateWindow(
159 TEXT("button"),
160 TEXT("hehe"),
161 WS_VISIBLE | WS_CHILD,
162 190, 50, 60, 30, hWnd,
163 (HMENU)MYBUTTON3,
164 hInst,
165 NULL);
166
167 case WM_COMMAND:
168 wmId = LOWORD(wParam);
169 wmEvent = HIWORD(wParam);
170 // 分析菜单选择:
171 switch (wmId)
172 {
173 case MYBUTTON1:
174 {
175 HDC hDc = GetDC(NULL);
176 TextOut(hDc, 0, 0, TEXT("15PB"), 4);
177 ReleaseDC(hWnd, hDc);
178 }
179 break;
180 case MYBUTTON2:
181 {
182 HDC hDc = GetWindowDC(hWnd);
183 TextOut(hDc, 0, 20, TEXT("15PB"), 4);
184 }
185 break;
186 case MYBUTTON3:
187 {
188 HDC hDc = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
189 TextOut(hDc, 100, 100, TEXT("15PB"), 4);
190 }
191 default:
192 return DefWindowProc(hWnd, message, wParam, lParam);
193 }
194 break;
195 case WM_PAINT:
196 {
197 hdc = BeginPaint(hWnd, &ps);
198 // TODO: 在此添加任意绘图代码...
199 //用以验证有效区域和无效区域
200 nNum++;
201 TCHAR buf[20] = {};
202 _stprintf_s(buf, 20, TEXT("%d"), nNum);
203 TextOut(hdc, 100, 100, buf, _tcsclen(buf));
204 EndPaint(hWnd, &ps);
205 break;
206 }
207 case WM_NCPAINT:
208 {
209 // HDC hdc;
210 // hdc = GetDCEx(hWnd, (HRGN)wParam, DCX_WINDOW | DCX_INTERSECTRGN);
211 // TextOut(hdc, 0, 0, TEXT("15PB"), 4);
212 // ReleaseDC(hWnd, hdc);
213 return DefWindowProc(hWnd, message, wParam, lParam);
214 break;
215 }
216 case WM_DESTROY:
217 PostQuitMessage(0);
218 break;
219 default:
220 return DefWindowProc(hWnd, message, wParam, lParam);
221 }
222 return 0;
223 }
224
225 // “关于”框的消息处理程序。
226 INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
227 {
228 UNREFERENCED_PARAMETER(lParam);
229 switch (message)
230 {
231 case WM_INITDIALOG:
232 return (INT_PTR)TRUE;
233
234 case WM_COMMAND:
235 if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
236 {
237 EndDialog(hDlg, LOWORD(wParam));
238 return (INT_PTR)TRUE;
239 }
240 break;
241 }
242 return (INT_PTR)FALSE;
243 }
时间： 2024-09-30 15:06:42