创建一个完整Win32程序

 

创建一个Win32程序的步骤：

1           WinMain函数的的定义

2           创建一个窗口

2.1.1     设计一个窗口类

2.1.2     注册窗口类

2.1.3     创建窗口

2.1.4     显示及更新窗口

3           进行消息循环

4           编写消息过程函数

 

WinMain
int WINAPI WinMain (

 HINSTANCE hInstance, // handle to current instance，given by OS

 HINSTANCE hPrevInstance, // handle to previous instance ,Null in Win32

 LPSTR lpCmdLine,      // pointer to command line

 int nCmdShow          // show state of window

);

 

 

创建一个窗口

通过WNDCLASS结构体来创建窗口类

typedef struct _WNDCLASS {

    UINT    style; 指定窗口的样式

    WNDPROC lpfnWndProc; 窗口的回调函数

    int     cbClsExtra; 0

    int     cbWndExtra; 0

    HANDLE hInstance;

    HICON   hIcon;

    HCURSOR hCursor;

    HBRUSH hbrBackground;

    LPCTSTR lpszMenuName;

    LPCTSTR lpszClassName;

} WNDCLASS;

 

注册窗口类

ATOM RegisterClass(

 CONST WNDCLASS *lpWndClass   // address of structure with class

                               // data

);

创建窗口

HWND CreateWindow(

 LPCTSTR lpClassName, // pointer to registered class name

 LPCTSTR lpWindowName, // pointer to window name

 DWORD dwStyle,        // window style

 int x,                // horizontal position of window

 int y,                // vertical position of window

 int nWidth,           // window width

 int nHeight,          // window height

 HWND hWndParent,      // handle to parent or owner window

 HMENU hMenu,          // handle to menu or child-window identifier

 HANDLE hInstance,     // handle to application instance

 LPVOID lpParam        // pointer to window-creation data

);

 

显示及更新窗口

BOOL ShowWindow( int nCmdShow );

BOOL UpdateWindow(

 HWND hWnd   // handle of window

);

消息循环

BOOL GetMessage(

 LPMSG lpMsg,         // address of structure with message

 HWND hWnd,           // handle of window

 UINT wMsgFilterMin,  // first message

 UINT wMsgFilterMax   // last message

);

If the function retrieves a message other than WM_QUIT, the return value is nonzero.

If the function retrieves the WM_QUIT message, the return value is zero.

 

MSG msg;

While (GetMessage (&msg,NULL,0,0))

{

TranslateMessage();

DispatchMessage();

 

}

 

消息过程函数

LRESULT CALLBACK WindowProc(

 HWND hwnd,      // handle to window

 UINT uMsg,      // message identifier

 WPARAM wParam, // first message parameter

 LPARAM lParam   // second message parameter

);

 函数原型一定要相同,函数名可以更改,函数用switch对消息进行处理.

程序:

#include <windows.h>
#include <stdio.h>

LRESULT CALLBACK WinProc(
  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="wangjing";
 wndcls.lpszMenuName=NULL;
 wndcls.style=CS_HREDRAW | CS_VREDRAW;

 RegisterClass(&wndcls);

 HWND hwnd;

 hwnd=CreateWindow("wangjing","Title",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 msg.wParam;
}

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 code is %d",wParam);
  MessageBox(hwnd,szChar,"char",0);
  break;
 case WM_LBUTTONDOWN:
  MessageBox(hwnd,"mouse clicked","message",0);
  HDC hdc;
  hdc=GetDC(hwnd);
  TextOut(hdc,0,50,"程序员之家",strlen("程序员之家"));
  //ReleaseDC(hwnd,hdc);
  break;
 case WM_PAINT:
  HDC hDC;
  PAINTSTRUCT ps;
  hDC=BeginPaint(hwnd,&ps);
  TextOut(hDC,0,0,"Test",strlen("Test"));
  EndPaint(hwnd,&ps);
  break;
 case WM_CLOSE:
  if(IDYES==MessageBox(hwnd,"是否真的结束？","message",MB_YESNO))
  {
   DestroyWindow(hwnd);
  }
  break;
 case WM_DESTROY:
  PostQuitMessage(0);
  break;
 default:
  return DefWindowProc(hwnd,uMsg,wParam,lParam);
 }
 return 0;
}