Increasing dropdown list width in grid

[Andrus]

I'm using WinForms DataGridView
I need to make dropdown list wider that grid column width.
I tried the following code, but dropdown list widht is the same as column
width.

How to increase dropdown list width ?

Andrus.

To reproduce

1. Run the code.
2. Open dropdown list

Observed:

Dropdown list width is same as column width

Expected:

Dropdown list width must be greater than column width
using System;
using System.Windows.Forms;

class Form1 : Form {

[STAThread]
static void Main() {
try {
Application.Run(new Form1());
}
catch (Exception e) {
MessageBox.Show(e.ToString());
}
}

private DataGridView dataGridView1 = new DataGridView();

public Form1() {
Controls.Add(this.dataGridView1);
Load += new EventHandler(Form1_Load);
}

private void Form1_Load(object sender, EventArgs e) {
DataGridViewComboBoxColumn
col = new DataGridViewComboBoxColumn();
// this is ignored. Why ?
col.DropDownWidth *= 3;
dataGridView1.Columns.Add(col);
}
}