DosClose

This call closes a handle to a file, pipe, or device.

DosClose

(FileHandle)

FileHandle (HFILE) - input

Handle returned by a previous DosOpen, DosMakeNmPipe, or DosMakePipe call.
rc (USHORT) - return
Return code descriptions are:
• NO_ERROR 2
  ERROR_FILE_NOT_FOUND
  5
  ERROR_ACCESS_DENIED
  6
  ERROR_INVALID_HANDLE
  Remarks

  Issuing DosClose with the handle to a file closes a handle to a file, pipe, or device.

  If one or more additional handles to a file have been created with DosDupHandle, the directory is not updated and all internal buffers are not written to the medium until DosClose has been issued for the duplicated handles.

  Closing a handle to a device causes the device to be notified of the close, if appropriate.

  
  Named Pipe Considerations

  DosClose closes a named pipe by handle. When all handles referencing one end of a pipe are closed, the pipe is considered broken.

  If the client end closes, no other process can re-open the pipe until the serving end issues a DosDisConnectNmPipe followed by a DosConnectNmPipe.

  If the server end closes when the pipe is already broken, it is deallocated immediately; otherwise, the pipe is not deallocated until the last client handle is closed.

  ---

  [Back: DosCLIAccess]
  [Next: DosCloseQueue]