>_<:first build some points put in poly1[],poly2[] and poly3[] in the function of InitInstance(...)
>_<:then in the function MyDraw() use PolylineTo(...)Polyline(...)Polygon(...) draw diferent line and use PolyBezierTo(...)PolyBezier(...) draw two kind curve separately.
>_<:finally show the different among these functions.
>_<!there I don't use message to draw, instread I put the MyDraw() in the last of InitInstance(...) function.
1 //{{NO_DEPENDENCIES}} 2 // Microsoft Visual C++ generated include file. 3 // Used by FE.RC 4 // 5 #define IDR_MAINFRAME 128 6 #define IDD_FE_DIALOG 102 7 #define IDD_ABOUTBOX 103 8 #define IDS_APP_TITLE 103 9 #define IDM_ABOUT 104 10 #define IDM_EXIT 105 11 #define IDS_HELLO 106 12 #define IDI_FE 107 13 #define IDI_SMALL 108 14 #define IDC_FE 109 15 #define IDC_MYICON 2 16 #define IDC_STATIC -1 17 // Next default values for new objects 18 // 19 #ifdef APSTUDIO_INVOKED 20 #ifndef APSTUDIO_READONLY_SYMBOLS 21 22 #define _APS_NEXT_RESOURCE_VALUE 129 23 #define _APS_NEXT_COMMAND_VALUE 32771 24 #define _APS_NEXT_CONTROL_VALUE 1000 25 #define _APS_NEXT_SYMED_VALUE 110 26 #endif 27 #endif
1 // stdafx.h : include file for standard system include files, 2 // or project specific include files that are used frequently, but 3 // are changed infrequently 4 // 5 6 #if !defined(AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_) 7 #define AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_ 8 9 #if _MSC_VER > 1000 10 #pragma once 11 #endif // _MSC_VER > 1000 12 13 #define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers 14 15 16 // Windows Header Files: 17 #include <windows.h> 18 19 // C RunTime Header Files 20 #include <stdlib.h> 21 #include <malloc.h> 22 #include <memory.h> 23 #include <tchar.h> 24 25 // Local Header Files 26 27 // TODO: reference additional headers your program requires here 28 29 //{{AFX_INSERT_LOCATION}} 30 // Microsoft Visual C++ will insert additional declarations immediately before the previous line. 31 32 #endif // !defined(AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_)
main.cpp
1 #include "stdafx.h" 2 #include "resourse.h" 3 #include "math.h" 4 5 #define MAX_LOADSTRING 100 6 7 // Global Variables: 8 HINSTANCE hInst; // current instance 9 TCHAR szTitle[MAX_LOADSTRING]; // The title bar text 10 TCHAR szWindowClass[MAX_LOADSTRING]; // The title bar text 11 HPEN hPen; 12 HBRUSH hBru; 13 POINT poly1[5]; 14 POINT poly2[5]; 15 POINT poly3[5]; 16 // Foward declarations of functions included in this code module: 17 ATOM MyRegisterClass(HINSTANCE hInstance); 18 BOOL InitInstance(HINSTANCE, int); 19 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); 20 LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM); 21 void MyPaint(HDC hdc); 22 //======================================================================================== 23 int APIENTRY WinMain(HINSTANCE hInstance, 24 HINSTANCE hPrevInstance, 25 LPSTR lpCmdLine, 26 int nCmdShow) 27 { 28 // TODO: Place code here. 29 MSG msg; 30 31 MyRegisterClass(hInstance);//调用函数向系统注册窗口类别，输入参数hInstance是目前运行程序的对象代码； 32 33 // 调用InitInstance函数，进行初始化操作； 34 if (!InitInstance (hInstance, nCmdShow)) 35 { 36 return FALSE; 37 } 38 39 // 消息循环（通过消息循环来获取信息， 40 //进行必要的键盘信息转换而后将控制权交给操作系统， 41 //有操作系统决定哪个程序的消息处理函数处理消息 42 while (GetMessage(&msg, NULL, 0, 0)) //获取程序消息 43 { 44 TranslateMessage(&msg);//转换伪码及字符 45 DispatchMessage(&msg);//将控制权交给系统，再有系统决定负责处理消息的程序； 46 } 47 48 return msg.wParam; 49 } 50 //===================================================================================== 51 52 53 54 //============================================================================================= 55 //在建立程序窗口实体之前，必须先定义一个窗口类别，其中包含所要建立窗口的信息， 56 //并向系统注册，这里的MyRegisterClass函数就是进行定义及注册窗口类别的函数。 57 //============================================================================================== 58 ATOM MyRegisterClass(HINSTANCE hInstance) 59 { 60 WNDCLASSEX wcex; //申请一个窗口类别“WNDCLASSEX”和结构”wcex“ 61 //-------------------------------------------------------------- 62 //定义vcex结构的各项信息，其中设定信息处理函数（lpfnWndProc） 63 //为WNDPROC，类别名称为（lpszClassName）为”fe"; 64 //-------------------------------------------------------------- 65 wcex.cbSize = sizeof(WNDCLASSEX); 66 67 wcex.style = CS_HREDRAW | CS_VREDRAW; 68 wcex.lpfnWndProc = (WNDPROC)WndProc; 69 wcex.cbClsExtra = 0; 70 wcex.cbWndExtra = 0; 71 wcex.hInstance = hInstance; 72 wcex.hIcon = NULL; 73 wcex.hCursor = NULL; 74 wcex.hCursor = LoadCursor(NULL,IDC_ARROW); 75 wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); 76 wcex.lpszMenuName = NULL; 77 wcex.lpszClassName = "fe"; 78 wcex.hIconSm = NULL; 79 80 return RegisterClassEx(&wcex);//调用RegisterClassEx函数注册类别，返回一个“ATOM"形态的字符串 81 //此字符串即为类别名称”fe"; 82 } 83 //============================================================================================ 84 85 86 //============================================================================================ 87 //按照前面所定义的窗口类别来建立并显示实际的程序窗口 88 //============================================================================================ 89 BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) 90 { 91 HWND hWnd; 92 HDC hdc; 93 int i; 94 const double pi=3.1415926535; 95 hInst = hInstance; // 把instance handle 储存在全局变量中； 96 97 hWnd = CreateWindow("fe","绘图窗口",WS_OVERLAPPEDWINDOW, 98 CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); 99 //----------------------------------------------- 100 //调用CreateWindow函数来建立一个窗口对象 101 //第一个参数就是窗口建立依据的类别名称 102 //----------------------------------------------- 103 if (!hWnd) 104 { 105 return FALSE; 106 } 107 //------------------------------------------------ 108 //设定窗口的位置及窗口的大小，然后绘制显示在设备上 109 //------------------------------------------------- 110 MoveWindow(hWnd,10,10,600,450,true);//位置及大小 111 ShowWindow(hWnd, nCmdShow);//改定窗口显示时的状态 112 UpdateWindow(hWnd);//将窗口绘制在显示设备上 113 114 for(i=0;i<=4;i++) 115 { 116 poly1[i].x = 100 + 100 * sin(i * 72 * pi / 180); 117 poly1[i].y = 100 + 100 * cos(i * 72 * pi / 180); 118 119 poly2[i].x = poly1[i].x + 300; 120 poly2[i].y = poly1[i].y; 121 122 poly3[i].x = poly1[i].x + 180; 123 poly3[i].y = poly1[i].y + 200; 124 } 125 126 hPen = CreatePen(PS_SOLID,5,RGB(20,240,0)); 127 //hBru = GreateHatchBrush(HS_BDIAGONAL,RGB(0,255,0)); 128 129 hdc = GetDC(hWnd); 130 MyPaint(hdc); 131 ReleaseDC(hWnd,hdc); 132 133 return TRUE; 134 } 135 //============================================================================================ 136 137 138 //============================================================================================ 139 // 140 //============================================================================================ 141 void MyPaint(HDC hdc) 142 { 143 SelectObject(hdc,hPen); 144 SelectObject(hdc,hBru); 145 146 //PolylineTo(hdc,poly1,4); 147 //Polyline(hdc,poly2,4); 148 //Polygon(hdc,poly3,4); 149 150 //PolyBezierTo(hdc,poly1,3); 151 PolyBezier(hdc,poly1,4); 152 } 153 //============================================================================================ 154 155 //============================================================================================ 156 //在前面定义类别的时候把WndProc定义为消息处理函数（当某些外部消息发生时，会按消息的类型 157 //来决定该如何进行处理。此外该函数也是一个回叫函数（CALLBACK)（windows系统函数）每一个 158 //程序都会接收信息，选择性接受、处理； 159 //============================================================================================ 160 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) 161 { 162 PAINTSTRUCT ps; 163 HDC hdc; 164 165 switch (message) //判断消息类型 166 { 167 case WM_PAINT: //窗口重绘制 168 hdc = BeginPaint(hWnd, &ps); 169 EndPaint(hWnd, &ps); 170 break; 171 case WM_DESTROY: //处理窗口结束消息 172 PostQuitMessage(0); 173 break; 174 default: 175 return DefWindowProc(hWnd, message, wParam, lParam); 176 } 177 return 0; 178 } 179 //============================================================================================