>I want that locontrol is a character string.
>But i thing that locontrol is an oject yet.

If loControl is a character string of a valid control, you can do:

&loControl..RecordSOurce = ...

or

loO = eval(loControl)
loO.RecordSource = ...

If you are using my code sample, you'll want lcControl source (the "c" makes a difference).