System.Windows.Forms.ToolStripDropDownButton.OnMouseDown C# (CSharp) Method

		protected override void OnMouseDown (MouseEventArgs e)
		{
			if (e.Button == MouseButtons.Left) {
				if (this.DropDown.Visible)
					this.HideDropDown (ToolStripDropDownCloseReason.ItemClicked);
				else
					this.ShowDropDown ();
			}
			
			base.OnMouseDown (e);
		}