Select a folder starts with XXX using TCL in Hypergraph

Dear Friends,

Please help me with the following:

I want my Hypergraph to select a Folder that starts with something and then follows the path given to open a .binout0000 file.

Example:     *Parameter(PLOT_FILE_1, PLOT_FILE_1, FILENAME, '*', XXXX /THDATA/binout0000)

Here I would like to add a script or code where XXXX is written to choose the folder that starts with lets say ABCD

Thanks in advance!!