孙鑫c++教程笔记（1）

一、句柄类型

图标句柄HICO、光标句柄HCURSOR、窗口句柄HWND、应用程序实例句柄类型HINSTANCE

二、Windows程序的入口函数

int WINAPI WinMain(

  HINSTANCE hInstance,      // handle to current instance

  HINSTANCE hPrevInstance,  // handle to previous instance

LPSTR lpCmdLine,          // command line类似于传入参数 LP开头为长指针类型   int nCmdShow              // show state窗口如何显示

);

三、创建完整窗口步骤：

1.       设计一个窗口类

窗口类：WNDCLASS

typedef struct _WNDCLASS {

   UINT    style; 

   WNDPROC lpfnWndProc; //指定回调函数

   int     cbClsExtra; 

   int     cbWndExtra; //通常设为0

   HANDLE  hInstance; //实例号

   HICON   hIcon; //图标句柄

   HCURSOR  hCursor; //光标句柄

   HBRUSH  hbrBackground; //画刷，窗口背景颜色

   LPCTSTR  lpszMenuName; //菜单栏名字

   LPCTSTR  lpszClassName; //窗口名字

} WNDCLASS;

回调函数：WindowProc

LRESULT CALLBACK WindowProc(  _In_ HWND   hwnd,  _In_ UINT   uMsg,  _In_ WPARAM wParam,  _In_ LPARAM lParam);

2.       注册窗口类

RegisterClass(窗口类指针)

3.       创建窗口

HWDN hwdn；

Hwdn=CreateWindows(classname,title,style,x,y,width,父窗口，菜单，实例号，多文档附加参数)

4.       显示及更新窗口

ShowWindow(hwdn,status);

UpdateWindow(hwnd)

 

四、GetMessage()获得窗口消息

csdn在线查询：https://msdn.microsoft.com/en-us/library/ms950410.aspx

第一节代码：

#include <windows.h>#include <stdio.h>LRESULT CALLBACK WinSunProc(  HWND hwnd,      // handle to window  UINT uMsg,      // message identifier  WPARAM wParam,  // first message parameter  LPARAM lParam   // second message parameter);int WINAPI WinMain(  HINSTANCE hInstance,      // handle to current instance  HINSTANCE hPrevInstance,  // handle to previous instance  LPSTR lpCmdLine,          // command line  int nCmdShow              // show state){WNDCLASS wndcls;wndcls.cbClsExtra=0;wndcls.cbWndExtra=0;wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);wndcls.hInstance=hInstance;wndcls.lpfnWndProc=WinSunProc;wndcls.lpszClassName="Weixin2003";wndcls.lpszMenuName=NULL;wndcls.style=CS_HREDRAW | CS_VREDRAW;RegisterClass(&wndcls);HWND hwnd;hwnd=CreateWindow("Weixin2003","北京维新科学技术培训中心",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL);ShowWindow(hwnd,SW_SHOWNORMAL);UpdateWindow(hwnd);MSG msg;while(GetMessage(&msg,NULL,0,0)){TranslateMessage(&msg);DispatchMessage(&msg);}return 0;}LRESULT CALLBACK WinSunProc(  HWND hwnd,      // handle to window  UINT uMsg,      // message identifier  WPARAM wParam,  // first message parameter  LPARAM lParam   // second message parameter){switch(uMsg){case WM_CHAR:char szChar[20];sprintf(szChar,"char is %d",wParam);MessageBox(hwnd,szChar,"weixin",0);break;case WM_LBUTTONDOWN:MessageBox(hwnd,"mouse clicked","weixin",0);HDC hdc;hdc=GetDC(hwnd);TextOut(hdc,0,50,"计算机编程语言培训",strlen("计算机编程语言培训"));ReleaseDC(hwnd,hdc);break;case WM_PAINT:HDC hDC;PAINTSTRUCT ps;hDC=BeginPaint(hwnd,&ps);TextOut(hDC,0,0,"维新培训",strlen("维新培训"));EndPaint(hwnd,&ps);break;case WM_CLOSE:if(IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO)){DestroyWindow(hwnd);//quit windows}break;case WM_DESTROY:PostQuitMessage(0);//Getmessage() return 0;quit app ;break;default:return DefWindowProc(hwnd,uMsg,wParam,lParam);//default mes deal}return 0;}