VBA Syntax For Set objfolder

I normally have my sent e-mail saved in the Sent Items folder. However, I often wish to save to my "Follow-Up" folder in the Outlook folder list instead. I have a macro that assigns a Category to the e-mail, but would like to add the Set objfolder command to change from saving the e-mail in the Sent Items to saving it in the Follow-Up folder. Can someone tell me the proper syntax for set objfolder as follows.
Set objFolder = ???
Thanks.

It appears that Outlook messages when sent are saved to the folder specified in the SaveSentMessagesFolder. Can someone help me with how I can specify my Outlook "Follow-UP" folder in the SaveSentMessagesFolder in an Outlook Macro.