In your Project References, set a reference to the Microsoft Access Object Library.

In the declarations section of your form, put:

Private Axs As Access.Application

In a click event somewhere, put:

Set Axs = CreateObject("Access.Application")
Axs.OpenCurrentDatabase (DBPath)
Axs.DoCmd.OpenQuery "Query2"

If you already have the database open, omit line 2.
In line 3, replace "Query2" with the name of the Access Query that you want to run.

Hope this helps.