VC中调用外部程序

 WinExec(“Application”，SW_HIDE);

microsoft 帮助：

UINT WinExec(
  LPCSTR lpCmdLine,
  UINT uCmdShow
);

其中nCmdShow 
 

  [in] Specifies how the window is to be shown. This parameter is ignored the first time an application calls 
  ShowWindow, if the program that launched the application provides a 
  
   STARTUPINFO
   structure. Otherwise, the first time 
  ShowWindow is called, the value should be the value obtained by the 
  
   WinMain
   function in its 
  nCmdShow parameter. In subsequent calls, this parameter can be one of the following values. 
  

   
    SW_FORCEMINIMIZE 
   
   

    Windows 2000/XP: Minimizes a window, even if the thread that owns the window is not responding. This flag should only be used when minimizing windows from a different thread. 
   
   
    SW_HIDE 
   
   

    Hides the window and activates another window. 
   
   
    SW_MAXIMIZE 
   
   

    Maximizes the specified window. 
   
   
    SW_MINIMIZE 
   
   

    Minimizes the specified window and activates the next top-level window in the Z order. 
   
   
    SW_RESTORE 
   
   

    Activates and displays the window. If the window is minimized or maximized, the system restores it to its original size and position. An application should specify this flag when restoring a minimized window. 
   
   
    SW_SHOW 
   
   

    Activates the window and displays it in its current size and position. 
   
   
    SW_SHOWDEFAULT 
   
   

    Sets the show state based on the SW_ value specified in the 
    STARTUPINFO structure passed to the 
    
     CreateProcess
     function by the program that started the application. 
   
   
    SW_SHOWMAXIMIZED 
   
   

    Activates the window and displays it as a maximized window. 
   
   
    SW_SHOWMINIMIZED 
   
   

    Activates the window and displays it as a minimized window. 
   
   
    SW_SHOWMINNOACTIVE 
   
   

    Displays the window as a minimized window. This value is similar to SW_SHOWMINIMIZED, except the window is not activated. 
   
   
    SW_SHOWNA 
   
   

    Displays the window in its current size and position. This value is similar to SW_SHOW, except the window is not activated. 
   
   
    SW_SHOWNOACTIVATE 
   
   

    Displays a window in its most recent size and position. This value is similar to SW_SHOWNORMAL, except the window is not actived. 
   
   
    SW_SHOWNORMAL 
   
   

    Activates and displays a window. If the window is minimized or maximized, the system restores it to its original size and position. An application should specify this flag when displaying the window for the first time.