Help for Filter Combobox (DropDown) in TDBGrid

I need help guys.

I designed Grid to hold data using ComponentOne TdbGrid and in first column I put TdbDropDown to show selection for data.
What I really want, how can I filter combobox data each time user input each letter, the data must filter based on LIKE query, so only what query filtered will be shown on combobox dropdown
\I tried filter but failed, and i think I almost there, only maybe what Event I should put my code

Code:

---

On Error GoTo BCEErr
    Dim TempTxt As String
    Select Case ColIndex
        Case 0
        Select Case bJenis
        Case 0           
                TempTxt = "SELECT fID,fNameGoods FROM tbGoods  ORDER BY fNameGoods"
                Set BarangRS = dB.Execute(TempTxt)
                BarangRS.Filter = "fNameGoods LIKE '" & tgBeli.Columns(0).Text & "'"
                Set TDD.DataSource = BarangRS         
        End Select
    End Select
    Exit Sub
BCEErr:
    MsgBox err.Description, vbCritical

---

I put inside BeforeColEdit event and ColEdit event, no result as I expected

Please help

The LIKE clause should have at least one wild card. If no wild cards, then it is the same as comparing equality.
Ex: BarangRS.Filter = "fNameGoods LIKE '" & tgBeli.Columns(0).Text & "%'"

Thank you for your comment LaVolpe
Is this the great LaVolpe (created button ) ? :)

I tried to use wildcard, and the result ok, only if filter input first.
But what happened later, what i need is... each user type letter on keyboard the dropdown combo will be refresh with new filter.
I put inside BeforeColEdit event (only triggered once) and ColEdit (triggered one time only when user press letter)

How can I refresh dropdown each time user press letter on keyboard

Thank you