Public Sub Clear() 

Dim instance As ComboBoxCellType
 
instance.Clear()

public void Clear()

Dim cmbocell As New FarPoint.Win.Spread.CellType.ComboBoxCellType()
Dim list As New ListBox()
Dim dlg As DialogResult
cmbocell.Items() = (New String() {"One", "Two", "Three", "Four", "Five"})
cmbocell.Editable = False
FpSpread1.ActiveSheet.Cells(0, 0).CellType = cmbocell
dlg = MessageBox.Show("Do you want to clear the items?", "Clear", MessageBoxButtons.YesNo)
If dlg = DialogResult.Yes Then
     cmbocell.Clear()
End If

FarPoint.Win.Spread.CellType.ComboBoxCellType cmbocell = new FarPoint.Win.Spread.CellType.ComboBoxCellType();
DialogResult dlg;
cmbocell.Items = (new String[] {"One", "Two", "Three", "Four", "Five"});
cmbocell.Editable = false;
fpSpread1.ActiveSheet.Cells[0, 0].CellType = cmbocell;
dlg = MessageBox.Show("Do you want to clear the items?", "Clear", MessageBoxButtons.YesNo);
if (dlg == DialogResult.Yes)
{
     cmbocell.Clear();
}