How to set the style of the ComboBox control if it is dynamically added to the form

I dynamically add a ComboBox control to the form:
Set Combo1 = Controls.Add("VB.ComboBox", "Combo1")

I want to set its style to "Dropdown list":
Combo1.style = 2

But there is a compile error: "Can't assign to read-only property".

Then how to set the style of the ComboBox control if it is dynamically added to the form? Thanks a lot.

Check this site. Uses API.
http://216.26.168.92/tips/tip122.html
It uses check box and option box but maybe can use combo