/* */
LIBRARY rexxgui
guierr = "SYNTAX"
guiheading = 1
/* Start in a specific directory */
fn = 'h:\a_ms_rexxcode\'
filename = fn
DO
	err = guifile('filename', 'BROWSE|ENTRY', 'This is the title', , fn)
  CATCH SYNTAX
  	RETURN ""
END
SAY 'filename = 'filename

If opening the Directory dialog instead, then NameVar contains the directory that is initially selected when the dialog opens, and where the chosen directory is returned.

InitialDir is the initial directory where the File dialog opens. If omitted, then the dialog opens in the current directory. For the Directory dialog, InitialDir is the directory initially placed into the 'New Folder' ENTRY. If omitted, then the 'New Folder' ENTRY is blank.