D6: Get richedit line number

I'm using D6 Personal on Win2000. How do I get the line number from a 
Richedit component? I'm currently using this: 

y:=RichEdit.Perform(EM_LINEFROMCHAR,RichEdit.SelStart,0) ;
//Show y in status bar

But when I cursor up the line number doesn't change. Do I have to 
manually change the line number display in one of the Richedit Key 
events and look for the UP and DOWN cursors? And PGUP and PGDN? And 
RETURN?

It seems the above code only works when I hit RETURN to add a new line 
to the Richedit. 

Thanks.

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