arguments to sub reports

i want to use parent report's fields as a paramenter to sub reports. how can i do that??Firstly, read the help on subreports! Secondly, right click on the subreport and choose subreport links. Choose the field you want to pass down as a parameter, and then choose whether this should also be used in the subreport's record selection.|||thank you very much. i got my problem solved.