It's pretty simple to programmaticall y add items to a combobox at runtime. Just declare the object, then call ComboBox.Items. Add(...) for each item you wish to add. The one downside to this method is that you cannot specify values for the display member - the text shown in the ComboBox item - and the value member - the value returned when you query the combobox's SelectedValue property.
The simple way round this is to bind the combobox...