Use path of selected folder for next selection as default value

Hi jb4x, many thanks for the answer.
At this time i can save the absolute path with the selected file in a file.
How can i cut the filename from my saved string?
the next important step would be to read it and to say my control please start the select folder operation in this default folder…

but this i did’nt know.

Best regards, El_Paco