RequestId - numeric Request Id of a pending request ExtensionName - ObjectId string of the extension Flags - 0 is recommended. ...

RequestId -- numeric Request Id of a pending request
ExtensionName -- ObjectId string of the extension
Flags -- 0 is recommended.  1 makes the extension critical,
2 disables it, 3 does both.
If the last parameter is numeric, it is taken as a Long.
If it can be parsed as a date, it is taken as a Date.
If it starts with '@', the rest of the token is the filename containing binary data or an ascii-text hex dump.
Anything else is taken as a String.