This script event is fired when the focus was placed into a table cell.

ValidationForm_TableCellGotFocus( _
    ByVal pXDoc As CASCADELib.CscXDocument, _
    ByVal pField As CASCADELib.CscXDocField, _
    ByVal RowIndex As Long, _
    ByVal ColumnIndex As Long _
    )

pXDoc

XDocument object that is currently loaded.

pField

Field object that contains the table where a cell got the focus.

RowIndex

Zero-based index of the row the cell with the combo box belongs to.

ColumnIndex

Zero-based index of the column in the table the cell with the combo box belongs to. Using invisible columns this can be different from the displayed column index.