[ CCode ( has_target = false ) ]
public delegate void HelpFunc (string help_id, void* help_data)
This is the prototype for all functions you pass as help_func to the various GIMP dialog constructors like
Dialog, query_int_box
etc.
Help IDs are textual identifiers the help system uses to figure which page to display.
All these dialog constructors functions call help_connect.
In most cases it will be ok to use standard_help_func which does nothing but
passing the help_id string to help. If your plug-in needs some more
sophisticated help handling you can provide your own help_func which has to call
help to actually display the help.
| help_id |
the help ID |
| help_data |
the help user data |