You can create your own dialog window. Create a vi with all the features you want the dialog window to perform. Edit the connectors of the vi so they return what you want to retrieve (Right-click the upper right icon in the fron panel of the vi and select "Show Connectors"). Then, edit the configuration of your vi so it behave like a dialog box (Right-click the upper right icon again and select "VI Setup..."). Finally, add your vi to your main application vi.
I included an attachment as an example. The attachment is a .zip file. The example was written in LabVIEW 5. Run the vi with title "call dialog".
Good luck!
Enrique
www.vartortech.com