Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
　　C1FlexGrid1.Cols(1).ComboList = "|Red|Green|Blue|White"
End Sub

Private Sub C1FlexGrid1_RowColChange(sender As Object, e As EventArgs) Handles C1FlexGrid1.RowColChange
　　If (C1FlexGrid1.Cols(C1FlexGrid1.Col).ComboList <> String.Empty) Then
　　　　C1FlexGrid1.StartEditing()
　　　　Dim cb As ComboBox = CType(C1FlexGrid1.Editor, ComboBox)
　　　　cb.DroppedDown = True
　　End If
End Sub

private void Form1_Load(object sender, EventArgs e)
{
　　c1FlexGrid1.Cols[1].ComboList = "|Red|Green|Blue|White";
}

private void c1FlexGrid1_RowColChange(object sender, EventArgs e)
{
　　if (c1FlexGrid1.Cols[c1FlexGrid1.Col].ComboList != string.Empty)
　　{
　　　　c1FlexGrid1.StartEditing();
　　　　ComboBox cb = (ComboBox)c1FlexGrid1.Editor;
　　　　cb.DroppedDown = true;
　　}
}