populate toolstripitems to combobox
item1ToolStripMenuItem.Click += new System.EventHandler(ToolStripMenuItem_Click);
item2ToolStripMenuItem.Click += new System.EventHandler(ToolStripMenuItem_Click);
item3ToolStripMenuItem.Click += new System.EventHandler(ToolStripMenuItem_Click);
private void ToolStripMenuItem_Click(object sender, EventArgs e)
{
comboBox1.SelectedIndex = comboBox1.FindString(((ToolStripMenuItem)sender).Text);
}