This is the way that I do it:

You create a variable to connect to the detail grid and then add a column to the grid.  Then add a column and reference the name of an existing field in the view but give the column a different caption:

Set avlDetail = AccpacUI.UIAppControls("avlOEORDDdetail1").GetControl

ColCount = avlDetail.ColumnCount

avlDetail.AddColumn ColCount, "PSPRINTED", 0, kCanShipCaption, ALIGMENT_RIGHT, 100, False, False, True

Then in the OnSetCustomItemData event in the grid you can set the cell value for the current record.

Private Sub avlDetail_OnSetCustomItemData(ByVal bstrColName As String, ByVal bstrFieldName As String, pvBookMark As Variant, bstrData As String, pAccpacDSFields As Object)

    On Error GoTo avlDetail_OnSetCustomItemData_Error
    If StopCalcOfItemCanShip Then Exit Sub
    If CalculatingOrLoading Then Exit Sub
    If PostingOrder Then Exit Sub
    
    If bstrFieldName = "PSPRINTED" Then
        If bstrColName = kCanShipCaption Then
            bstrData = True
            If dsORDERDETAIL.Fields("DDTLTYPE").Value = 0 Then
                bstrData = True
            Else
                bstrData = CallGetCanShip
            End If
        End If
    End If

    On Error GoTo 0
    Exit Sub

avlDetail_OnSetCustomItemData_Error:

    MsgBox "Error " & Err.Number & " (" & Err.Description & ") in procedure avlDetail_OnSetCustomItemData of Form frmMain"
End Sub

Ok Great. Thanks for your help