[development-axapta] directory control on form

[ramankt2001]

We are on Axapta 3.0 SP3.

I would like to provide the users the choice to specify a network share on a 
form. 

In a dialog, I can use: 
dialogOutputDirectory = dialog.addFieldValue(typeid(FilePath), outputDirectory)

What control/statements would I use on the form?

Thanks.