From Xojo Documentation

Read-Only Property (As FolderItem )
FolderItemValue = aFolderItemDialog.Result

Supported for all project types and targets.

Holds the result of calling ShowModal() or ShowModalWithin.


If the user validates the dialog, Result contains the FolderItem corresponding to the selection; otherwise, Result is Nil.


This example displays the NativePath to the mp4 file that the user selects using the Result property.

Dim dlg As OpenDialog
Dim f As FolderItem
dlg = New OpenDialog
dlg.PromptText = "Select a file"
f = dlg.ShowModal
If dlg.Result <> Nil Then
MsgBox("You selected: " + dlg.Result.NativePath)
// User Cancelled
End If