Refreshing combobox list

Hi,
I have a form with a pair of combo boxes.* The first lists subfolders within a set location (Folder1 is the root, Folder2 contains the subfolders needed to be listed.* The second combo box lists the files contained within the subfolder selected in the first combo box.* I have a command button that opens the selected file, or if no file is selected, opens the folder in windows explorer.
If the user adds a file or subfolder to the directory when the macro is already running, the new information doesn't show up in the combo box list.* The user has to close and reopen the macro to view the new information.*
I want to add a command button to force a refresh of the data in the combo boxes but can't figure out how.* I'd appreciate any suggestions anyone might have.
Please see the below code:

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Originally Posted by PFDave

At the point the new file should be added to the list you can add into the code to call UserForm_Initialize which will relist the details in that combobox.

D'oh of course. Typical me looking for a complicated solution when the simplest is staring me right in the face! Thanks.