Combo box in flash

Flash has an inbuilt function that allows you to insert combo box in flash easy and quick. From the top menu options select window>components.
A window will appear with a few different categories to choose from, click on the plus symbol next to user interface and double click on the combo box option. This will insert an instance of a combo box on the stage.
You will now need to set the parameters of the combo box.
Select the combo box, in it's properties panel, there are three tabs to choose from, properties, filters and parameters, select the parameters tab.
A table will now appear allowing you to change the parameters, double click in the empty box next to label. (The labels are the options that will appear in the combo box). Using the + symbol, insert the required labels.
Once you have inserted all the labels, test the flash movie.
Click on the combo box and all the labels you just created will appear in it.