There are two kinds of path controls available:
File Browser Widget —control that allows the user to specify a path and filename using a text box and browser widget that launches the Softimage File Browser dialog.
Folder Widget —control that allows the user to specify a folder using a text box and folder widget that launches a Folder Picker dialog.
The user can change the text that appears in these controls directly, but they can also be changed dynamically through Logic (see Dynamically Changing Custom Properties).