窗口子类化

#include <windows.h>

#define ID_EDIT    
1

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);
LRESULT
CALLBACK NewWndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM
lParam);
WNDPROC OldWndProc;
static HINSTANCE hIns;
char
temp[505];

TCHAR szAppName[] = TEXT ("Lab11") ;

int WINAPI WinMain
(HINSTANCE hInstance, HINSTANCE
hPrevInstance,
                   
PSTR szCmdLine, int iCmdShow)
{
    
HWND     hwnd ;
    
MSG      msg ;
     WNDCLASS
wndclass ;
     
    
wndclass.style         = CS_HREDRAW |
CS_VREDRAW ;
     wndclass.lpfnWndProc   =
WndProc ;
     wndclass.cbClsExtra    = 0
;
     wndclass.cbWndExtra    = 0
;
     wndclass.hInstance     =
hInstance ;
    
wndclass.hIcon         = LoadIcon (NULL,
IDI_APPLICATION) ;
    
wndclass.hCursor       = LoadCursor (NULL,
IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH)
GetStockObject (WHITE_BRUSH) ;
    
wndclass.lpszMenuName  = NULL ;
    
wndclass.lpszClassName = szAppName ;
   
 
     if (!RegisterClass
(&wndclass))
    
{
          MessageBox (NULL,
TEXT ("Failed to
RegisterClass!"),
                     
szAppName, MB_ICONERROR)
;
          return 0
;
     }
   
 
     hwnd = CreateWindow (szAppName,
szAppName,
                         
WS_OVERLAPPEDWINDOW,
                         
CW_USEDEFAULT,
CW_USEDEFAULT,
                         
CW_USEDEFAULT,
CW_USEDEFAULT,
                         
NULL, NULL, hInstance, NULL) ;
   
 
     ShowWindow (hwnd, iCmdShow)
;
     UpdateWindow (hwnd) ;
   
 
     while (GetMessage (&msg, NULL, 0,
0))
    
{
          TranslateMessage
(&msg) ;
         
DispatchMessage (&msg) ;
    
}
     return msg.wParam ;
}

LRESULT CALLBACK
WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM
lParam)
{
     static HWND hwndEdit
;
     
     switch
(message)
     {
     case
WM_CREATE :
         
hIns=((LPCREATESTRUCT)lParam)->hInstance;
         
hwndEdit = CreateWindow (TEXT ("edit"),
NULL,
                        
WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL
|
                                  
WS_BORDER | ES_LEFT | ES_MULTILINE
|
                                  
ES_AUTOHSCROLL |
ES_AUTOVSCROLL,
                        
0, 0, 0, 0, hwnd, (HMENU)
ID_EDIT,
                        
((LPCREATESTRUCT) lParam) -> hInstance, NULL) ;
  
      
OldWndProc=(WNDPROC)SetWindowLong(hwndEdit,GWL_WNDPROC,(long)NewWndProc);
         
return 0 ;
        
 
     case WM_SETFOCUS
:
          SetFocus (hwndEdit)
;
          return 0
;
        
 
     case WM_SIZE :

          MoveWindow (hwndEdit,
0, 0, LOWORD (lParam), HIWORD (lParam), TRUE)
;
          return 0
;
        
 
     case WM_COMMAND
:
          if (LOWORD (wParam)
==
ID_EDIT){
              
if (HIWORD (wParam) == EN_ERRSPACE ||

                        
HIWORD (wParam) ==
EN_MAXTEXT)

                   
MessageBox (hwnd, TEXT ("Edit control out of
space."),
                               
szAppName, MB_OK | MB_ICONSTOP) ;
      
   }
        
 
          return 0
;
             
 
     case WM_DESTROY
:
          PostQuitMessage (0)
;
          return 0
;
     }
     return DefWindowProc
(hwnd, message, wParam, lParam) ;
    
}
POINT
p;
char num[][10]={"January","September"};

LRESULT CALLBACK
NewWndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM
lParam)

{
    HMENU
hMenu,hMenuTrackPopup;
    switch(message){
  
 case WM_KEYDOWN:
      
 switch(wParam){
        case
VK_F1:
            MessageBox
(hWnd, TEXT ("需要的信息!"),szAppName, MB_OK | MB_ICONINFORMATION) ;
  
         break;
  
     }
      
 break;
    case WM_RBUTTONDOWN:

  
   
 hMenu=LoadMenu(hIns,MAKEINTRESOURCE(101));
  
     hMenuTrackPopup=GetSubMenu(hMenu,0);
  
     p.x=LOWORD(lParam);
      
 p.y=HIWORD(lParam);
      
 ClientToScreen(hWnd,&p);
      
 TrackPopupMenu(hMenuTrackPopup,TPM_TOPALIGN|TPM_LEFTALIGN,p.x,p.y,0,hWnd,0);

  
     break;
    case
WM_COMMAND:
      
 switch(LOWORD(wParam)){
         
case 40001:
             
memset(temp,0,sizeof(temp));
      
      
SendMessageA(hWnd,WM_GETTEXT,500,(LPARAM)&temp);
  
          
strcat(temp,num[0]);
          
  
SendMessageA(hWnd,WM_SETTEXT,500,(LPARAM)&temp);
  
           //MessageBox (hWnd, TEXT
("1"),szAppName, MB_OK | MB_ICONINFORMATION) ;
  
           break;
  
       case 40002:
      
       //MessageBox (hWnd, TEXT ("2"),szAppName, MB_OK
| MB_ICONINFORMATION) ;
          
   memset(temp,0,sizeof(temp));
      
      
SendMessageA(hWnd,WM_GETTEXT,500,(LPARAM)&temp);
  
          
strcat(temp,num[1]);
          
  
SendMessageA(hWnd,WM_SETTEXT,500,(LPARAM)&temp);
  
           break;
  
       }
      
 break;
    }

   return
CallWindowProc(OldWndProc,hWnd,message,wParam,lParam);

}

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