Could someone please help with the following

I have a macro that will select some cell say L200

Is there anyway that I can have the macro select all of the row that the active cell is currently in and also select all the rows to row 600.

So all that is selected is the activecell row and the rest to 600

so if the active cell is in 500 - 500 to 600 would be selected (the whole row)

Thanks for any help!