>I have a combobox and a grid in my form.The combobox contains Clients and the grid contains payments of each client.Each one can be more than one payment.Both controls(combobox and grid) are relationed.I just set ChildOrder, LinkMaster and RecordSource in my Grid.Now, the question is how can I do when I skip in the toolbar to the next record top, last, etc.for each payment appears only with the corresponding client?

So what you are saying is that you want to choose a client either by choosing that person with the combo box or my using top,prev,next,last buttons on the toolbar? If that is what you want to do:

The toolbar should call the movetop,moveprev,movenext,movelast events in the form. You will need to define these.

For example, the forms movetop event would have:

select Clients     && select the parent table
goto top           && move to the top record
thisform.refresh   && refresh the form

Was this was what you were asking?