I'm trying to write a simple widget. I have the core functionality working, but now I'm trying to add some simple used data.
The plugin fails with
Fatal error: Call to undefined function wp_register_widget_control()
Including widgets.php leads to more undefined function calls.
Searching on register_widget_control returns nothing....
Looking at other plugins, they don't seem to do anything special....
Is there something special I need to do to enable widget control?
Or is there a detailed HOWTO on writing widget controls?