ComboBox like a button?

Question

I have seen comboBoxes that looks like buttons with a small arrow to the right at the bottom, indicating that it's a drow down menu with several options. How is this done? Is there something I can change in the properties of the comboBox? Thanks!

EDIT: I'm using Windows Forms in Visual Studio 2010

Solution 1

This is called SplitButton and in .NET you have this available for toolbars but not for use in normal WinForms.

However, there are some alternatives such as:

1. This one on Codeproject
2. Another on CodeProject
3. Another one here

Solution 2

this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.comboBox1.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
this.comboBox1.FormattingEnabled = true;
this.comboBox1.Items.AddRange(new object[] 
{
    "Item 1",
    "Item 2",
    "Item 3",
    "Item 4",
    "Item 5"
});