How to show the combobox dropdown on entering a text in cell in WinForms GridGroupingControl?

//Assigning the column cell types as GridListControl
this.gridGroupingControl1.TableDescriptor.Columns["Description"].Appearance.AnyRecordFieldCell.CellType = GridCellTypeName.GridListControl;
 
//Enables Autocomplete
this.gridGroupingControl1.TableDescriptor.Columns["Description"].Appearance.AnyRecordFieldCell.AutoCompleteInEditMode = GridComboSelectionOptions.AutoSuggest;
 
//Triggering Event
this.gridGroupingControl1.TableControlCurrentCellKeyPress += gridGroupingControl1_TableControlCurrentCellKeyPress;
 
//Handling Event
void gridGroupingControl1_TableControlCurrentCellKeyPress(object sender, Syncfusion.Windows.Forms.Grid.Grouping.GridTableControlKeyPressEventArgs e)
{
   if (!e.TableControl.CurrentCell.IsDroppedDown)
   {
      e.TableControl.CurrentCell.ShowDropDown();
   }
}

'Assigning the column cell types as GridListControl.          
Private Me.gridGroupingControl1.TableDescriptor.Columns("Description").Appearance.AnyRecordFieldCell.CellType = GridCellTypeName.GridListControl
 
'Enables Autocomplete           
Private Me.gridGroupingControl1.TableDescriptor.Columns("Description").Appearance.AnyRecordFieldCell.AutoCompleteInEditMode = GridComboSelectionOptions.AutoSuggest
 
'Triggering Event
Private Me.gridGroupingControl1.TableControlCurrentCellKeyPress += AddressOf gridGroupingControl1_TableControlCurrentCellKeyPress
 
'Handling Event
Private Sub gridGroupingControl1_TableControlCurrentCellKeyPress(ByVal sender As Object, ByVal e As Syncfusion.Windows.Forms.Grid.Grouping.GridTableControlKeyPressEventArgs)
   If Not e.TableControl.CurrentCell.IsDroppedDown Then
      e.TableControl.CurrentCell.ShowDropDown()
   End If
End Sub