This are ActiveX controls, which are not included in the Office (or Access)
standart edition.
You will need MS Visual Studio, for example 6.0. This controls are part of
it, and when you install the Studio, it will install and register the
controls.
The other way is to have Office Developers Edition.
Those are VB user controls if memory serves. Not standard Active X
controls.
But really, you can easily create drive selectors using just a few api calls
(see the SysInfo demo in the free files area of our web site).
You can enumerate directories and files simply by using the Dir command by
first calling Dir(c:\somedir\*.*) and then subsequently simply calling Dir()
until the length of the return value is 0.
Much more independent than using a control you have to distribute.