Using TFileRec to store data in Userdata

How do I store data in TFileRec's UserData field in a Typed file?
Moving the data can be done by using Move function, but how to access a file, and write into the UserData field?
Ram_SambamurthyAsked:
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egonoCommented:
I dont know what you want to do but since TFileRec.UserDate is a array of byte you might try

Move(YourData,YourFileRec.UserData,SizeOf(YourData));

be sure that SizeOf(YourData)<=SizeOf(YourFileRec.UserData)

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Ram_SambamurthyAuthor Commented:
Edited text of question.
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Ram_SambamurthyAuthor Commented:
I know that to Move is the way to transfer the data, but how to actually access the disk file, and write data into the UserData field of TFileRec. Anyway, I found the answer in Delphi 4 developer's guide by Xavier Pacheco, and Steven Teixeira.

The way is to do:
cFileName := 'c:\xxx';
AssignFile(SomeFile, cFileName);

TFileRec(SomeFile).UserData := ....

============
what i did wrong was to declare

MyFileRec : TFileRec;  //and then
MyFileRec(SomeFile).UserData := ...
                       //which did not work.

thanks for your help.
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