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我正在用 C++ 编写控制台应用程序。

我使用 SetConsoleCtrlHandler 捕获任何应用程序关闭（CTRL+C、关闭控制台、Windows 关闭或注销）。

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

BOOL CtrlHandler( DWORD fdwCtrlType ) 
{   
  switch( fdwCtrlType ) 
  { 
    // Handle the CTRL-C signal. 
    case CTRL_C_EVENT: 
      printf( "Ctrl-C event\n\n" );
      Beep( 750, 300 );
      return( TRUE );

    // CTRL-CLOSE: confirm that the user wants to exit. 
    case CTRL_CLOSE_EVENT: 
      Beep( 600, 200 ); 
      printf( "Ctrl-Close event\n\n" );
      return( TRUE ); 

    // Pass other signals to the next handler. 
    case CTRL_BREAK_EVENT: 
      Beep( 900, 200 ); 
      printf( "Ctrl-Break event\n\n" );
      return FALSE; 

    case CTRL_LOGOFF_EVENT: 
      Beep( 1000, 200 ); 
      printf( "Ctrl-Logoff event\n\n" );
      return FALSE; 

    case CTRL_SHUTDOWN_EVENT: 
      Beep( 750, 500 ); 
      printf( "Ctrl-Shutdown event\n\n" );
      return FALSE; 

    default: 
      return FALSE; 
  } 
} 

int main( void ) 
{       
  //MessageBoxA(0, "test", "test", 0); // ****************

  if( SetConsoleCtrlHandler( (PHANDLER_ROUTINE) CtrlHandler, TRUE ) ) 
  { 
    printf( "\nThe Control Handler is installed.\n" ); 
    printf( "\n -- Now try pressing Ctrl+C or Ctrl+Break, or" ); 
    printf( "\n    try logging off or closing the console...\n" ); 
    printf( "\n(...waiting in a loop for events...)\n\n" ); 

    while( 1 ){ } 
  } 
  else 
  {
    printf( "\nERROR: Could not set control handler"); 
    return 1;
  }
  return 0;
}

这是 msdn 示例，它工作正常，直到我取消注释标记的行。当我这样做时，我的应用程序会处理 CTRL+C、CTRL+Break 和控制台关闭，但在关机或注销时它只是关闭而没有任何反应。

Windows 7、MSVC 10 快捷版

4

1 回答 1

1

As soon as you show a dialog from a console app, a message loop is created for that thread.

And once you've got a message loop, you have to handle WM_ENDSESSION and related messages.

于 2012-05-21T14:45:17.277 回答