C#WinForm窗體的管理

冷不防 2022-08-25 02:22 149阅读 0赞

**C\#WinForm窗體的管理**

**1.API申明**

// 將指定的應用程序窗口標題欄上的標題復制放入緩衝器   
  \[DllImport( " user32.dll " )\]  
 private  static  extern  int  GetWindowText( int  hWnd, StringBuilder title,  int  size);  
  
 // 列舉出屏幕上的窗口應用程序   
  \[DllImport( " user32.dll " )\]  
 private  static  extern  int  EnumWindows(EnumWindowsProc ewp,  int  lParam);  
  
 // 返回應用程序窗口是否顯示   
  \[DllImport( " user32.dll " )\]  
 private  static  extern  bool  IsWindowVisible( int  hWnd);  
  
 // 設置應用程序窗口是否顯示   
  \[DllImport( " user32.dll " )\]  
 private  static  extern  bool  ShowWindowAsync(IntPtr hWnd,  int  nCmdShow);  
  
 // 判斷應用程序窗口是否最小化   
  \[DllImport( " user32.dll " )\]  
 private  static  extern  bool  IsIconic( int  hwnd);  
  
 // 判斷應用程序窗口是否最大化   
  \[DllImport( " user32.dll " )\]  
 private  static  extern  bool  IsZoomed( int  hwnd);  
  
 // 將消息傳給指定窗口   
  \[DllImport( " user32.dll " )\]  
 public  static  extern  int  SendMessage( int  hWnd, uint  Msg, int  wParam, int  lParam);

**2.遍歷窗體**

private  const  int  SW\_HIDE  =  0 ;  
 private  const  int  SW\_SHOWNORMAL  =  1 ;  
 private  const  int  SW\_SHOWMINIMIZED  =  2 ;  
 private  const  int  SW\_SHOWMAXIMIZED  =  3 ;  
 private  const  int  SW\_SHOWNOACTIVATE  =  4 ;  
 private  const  int  SW\_RESTORE  =  9 ;  
 private  const  int  SW\_SHOWDEFAULT  =  10 ;  
 public  const  int  WM\_SYSCOMMAND  =  0x0112 ;  
 public  const  int  SC\_CLOSE  =  0xF060 ;  
  
  
 private  bool  EvalWindow( int  hWnd,  int  lParam)  
\{  // 檢測指定窗體   
   
 if  ( ! IsWindowVisible(hWnd))  
 return  true ;  
  
StringBuilder strTitle  =  new  StringBuilder( 256 );  
GetWindowText(hWnd, strTitle,  256 );  
  
 if  (strTitle.Length  ==  0 )  
 return  true ;  
  
 if  ((strTitle.ToString()  !=  " ScrnClear " ))  
\{  
 if  (IsIconic(hWnd))  
 // 窗體已最小化時的操作   
  else  if  (IsZoomed(hWnd))  
 // 窗體已最大化時的操作   
  else   
 // 窗體原始大小時的操作   
  \}  
  
 return  true ;  
\}  
  
 private  void  GetWindows()  
\{  
EnumWindowsProc ewp  =  new  EnumWindowsProc(EvalWindow);  
EnumWindows(ewp,  0 );  
\}

**3.操作窗體** hWnd.ToString()="888"

// 取得窗體裝態    
  if  (IsIconic(Convert.ToInt32( " 888 " )))  
 // 窗體最小化   
  else  if  (IsZoomed(Convert.ToInt32( " 888 " )))  
 // 窗體最大化   
  else   
 // 原始大小  
  
 // 關閉程序    
  SendMessage( " 888 " , WM\_SYSCOMMAND, SC\_CLOSE,  0 );  
  
 // 隱藏程序窗體   
  if  (IsWindowVisible( " 888 " ))  
ShowWindowAsync((IntPtr)Convert.ToInt32( " 888 " ), SW\_HIDE);  
  
 // 顯示並最大化窗體   
  ShowWindowAsync((IntPtr)Convert.ToInt32( " 888 " ), SW\_SHOWMAXIMIZED);  
  
 // 顯示並最小化窗體   
  ShowWindowAsync((IntPtr)Convert.ToInt32( " 888 " ), SW\_SHOWMINIMIZED);  
  
 // 設定窗體為原來大小顯示   
  ShowWindowAsync((IntPtr)Convert.ToInt32( " 888 " ), SW\_RESTORE);