I'm new in vba. I'll appreciate for any help.
I have database and need to create form with 2 combo-boxes and listbox. It should be work by select value in first combo-box I need get depedens values in second combo-box and from second combo-box get dependens values in listbox. Populate listbox from second combo-box I done. It look like:
Private Sub Combo2_Change()
 Me.List4.RowSource = "Select Result from v_Result where Proc_Id = " _
 + Me.Combo2.Value
 Me.List4.Requery
 Me.Combo2.Requery
End Sub
and now my problem include to process first combo-box.
Thanks for any help.

you should create another procedure that is triggered by Combo1_Change. The event should:

  1. clear contents of combo2 and list4
  2. clear rowsource of list4
  3. requery rowsource of combo2

Remember to ensure that "Limit to List" = YES on the properties of there three objects.