The IntelliSense function works by listing all the functions which relate to whatever you have typed before.
So if you have an object called "myObject" and you type "myObject." it will display all the methods myObject supports.
If you have a namespace called std (This contains things like lists, queues and input / output in C++), and you type "std::" a list of all the functions in the std namespace will appear.
This is where the problem lies, the "db" bit in front of the function name is just part of the name, not the name of a namespace or any other "unit" which can contain functions etc.
IanM's plugin used a namespace called "DBPro" if I remember correctly, so typing "DBPro::" would display all the functions in that namespace.
BlueGUI:Windows UI Plugin - All the power of the windows interface in your DBPro games.