Used to write a String to the pin at the specified slice.

Used to set the SubType of a String pin, which is a more detailed specification of the String, used by the GUI to guide the user to insert correct values. Note though that this does not prevent a user from setting "wrong" Strings on a pin. Ultimately each node is responsible for dealing with all possible inputs correctly. Should only be called once immediately after the pin has been created in IPlugin.SetPluginHost.

Alternative version to IStringOut.SetSubType() with more options.