How to use a variable in the save as file path of a macro

Hi, all I am still pretty fresh in the Macro writing world and hit a problem I can not seem to solve.  Our Sales team creates a folder named as a sales order number on a shared drive, we save all of our drawings as a PDF into a subfolder within that folder. My goal is to have a macro that uses a custom property that is the sales order number and puts it into the file path.  I have everything I need to do this except I can not get the variable that pulls my custom property to write as part of the file path. Here is what I tried.

Here is the section of Code I am referring too:

Set swDraw = swModel

Dim Rev As String

Dim Folder As String

Rev = swModel.CustomInfo("Revision")

Folder = swModel.CustomInfo("Sales Order")

Filepath = "C:\Users\jhixon\Desktop\%Folder%\Submittals\"

FileName = Left(swDraw.GetTitle, Len(swDraw.GetTitle) - 10)

swDraw.SaveAs (Filepath + FileName + " " + Rev + ".PDF")

What am I doing Wrong?

A lot of this code is thanks to

SolidworksApi macros