Make tooltips in exporter sdk

Hi,

I'm creating an exporter plug-in using SDK 5.5. And could anyone tell me how to make a tooltip (a tip appear when you mouse over a group, parameter or button)?

I know i'm a noob, but every help is appreciated. It could save me a lot of time reading the SDK manual and browsing through SDK sample, which i found rather lacking in detail and descrisption.

Thank you.