The problem is not in the CboDepHow class. When I change the CboUnitType control in FrmDesk.prg to be based on CboDepHow it works fine (waits for an enter

Now I have to consider differences between the two form programs...

Ah, I've got it.

    ***********************************************************************
    **&RS METHOD    txtSTAYcDepHow.valid|
    ***********************************************************************
    **Created.....: &&RS 2008.01.03 PRR3
    **History.....:
    **********************************************************************
    &&RS 2008.01.04 PRR3 TODO: option to wavie deposit
    procedure txtSTAYcDepHow.valid
    WAIT WINDOW NOWAIT 'SET("CONFIRM")=' + set("CONFIRM")
    do case
    case this.value == "CC"
        return this.parent.txtSTAYnParty
        &&RS 2008.01.19 PRR2 TODO: uncomment when implemented: return this.parent.txtSTAYcAutoTag
    case this.value == "CK"
        return this.parent.txtSTAYnDepPaid
    case this.value == "CA"
        return .t.
**      return this.parent.txtSTAYnDepPaid
    case this.value == "ND"
        this.parent.txtSTAYnDepPaid.value  = 0
        return this.parent.txtSTAYnParty
        &&RS 2008.01.19 PRR2 TODO:  return this.parent.txtSTAYcAutoTag
    otherwise
        Msg_RS("<Indicate how the deposit is paid:  CA-cash, CC-credit card, CK-check, ND-no deposit required>.","M")
        return .f.
    endcase
    endproc

When the RETURN statement in the VALID method contains the name of the next control, execution does not wait for another character to be entered.

BTW, CONFIRM was set on.

I'll probably go back to using a textbox instead of a combobox.

Thank you very much for your help. It helped me consider all the possibilities.

Peter