FilterClose function (fltuser.h)

The FilterClose function closes an open minifilter handle.

Syntax

HRESULT FilterClose(
  [in] HFILTER hFilter
);

[in] hFilter

Minifilter handle returned by a previous call to FilterCreate.

FilterClose returns S_OK if successful. Otherwise, it returns an error value.

After FilterClose is called, the minifilter handle that the hFilter parameter specifies is no longer valid and cannot safely be used.

Use FilterClose to close open minifilter handles returned by calls to FilterCreate. Use FilterFindClose to close handles returned by calls to FilterFindFirst.

To close a connection port handle that was opened by calling FilterConnectCommunicationPort, use CloseHandle.