CBFS Filter 2020 Delphi Edition

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AfterUnlockSingle Event

Fires after a particular locked byte range in a file is unlocked.


type TAfterUnlockSingleEvent = procedure (
  Sender: TObject;
  const FileName: String;
  Offset: Int64;
  Length: Int64;
  Key: Int64;
  var Status: Integer;
  var FileContext: Pointer;
  var HandleContext: Pointer;
  var ResultCode: Integer
) of Object;

property OnAfterUnlockSingle: TAfterUnlockSingleEvent read FOnAfterUnlockSingle write FOnAfterUnlockSingle;


This event fires after a particular locked byte range in the file specified by FileName is unlocked.

Applications only need to handle this event if they've added a standard filter rule that includes the FS_CE_AFTER_LOCK_CONTROL flag.

The Offset, Length, and Key parameters contain the starting byte offset, length, and key values (respectively) specified when the byte range was locked. Please refer to the AfterLock event's documentation for more information.

The Status parameter contains an NT status code that indicates the outcome of the operation; 0 indicates success. To convert this value to a Win32 error code, call the NtStatusToWin32Error method. Please note that this event won't fire for failed requests unless the ProcessFailedRequests property is enabled. Applications may change this parameter's value if they want a different NT status code to be returned.

The ResultCode parameter will always be 0 when the event is fired. If the event cannot be handled in a "successful" manner for some reason (e.g., a resource isn't available, security checks failed, etc.), set it to a non-zero value to report an appropriate error. Please refer to the Error Reporting and Handling topic for more information.

This event is fired synchronously; please refer to the Event Types topic for more information.

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CBFS Filter 2020 Delphi Edition - Version 20.0 [Build 8047]