Need dialog box to set path in program

I have three forms in the attached project named frmallowed.frm and frmblocked.frm and BlockList.frm   Essentially these forms access files to populate an MSFlexGrid.  Two forms are identical except for the file and folder locations they access.   I need a dialog box to set the location of all three of these forms.  I was thinking that in the menu, I could set these 3 path locations in a separate text file called paths.txt and then the program would be set.

In frmallowed.frm I need a dialog box that will set the location for the allowed.txt file.  I have comments by the needed line.

In frmblocked.frm I need a dialog box that will set the location for the blocked-custom.txt file   I have comments by the needed line.

In BlockList.frm I need a dialog box that will set the location for the DailyLogs folder    I have comments by the needed line.

How can I setup a dialog box as an example?
CB.zip