Public Function GetColumnIndex( _
   ByVal columnName As String _
) As Integer

Dim instance As DefaultSheetDataModel
Dim columnName As String
Dim value As Integer
 
value = instance.GetColumnIndex(columnName)

public int GetColumnIndex( 
   string columnName
)

FarPoint.Win.Spread.Model.DefaultSheetDataModel dm;
dm = fpSpread1.ActiveSheet.Models.Data;
int i = dm.GetColumnIndex("EmployeeID");
fpSpread1.ActiveSheet.Columns[i].ForeColor = Color.Red;

Dim dm As FarPoint.Win.Spread.Model.DefaultSheetDataModel
dm = FpSpread1.ActiveSheet.Models.Data
Dim i As Integer = dm.GetColumnIndex("EmployeeID")
FpSpread1.ActiveSheet.Columns(i).ForeColor = Color.Red