AIS_Manipulator: highlight / select parts

Hello all.

When a move into my view using interactiveContext->MoveTo(...), I can highlight the part of an AIS_Manipulator that is under the mouse cursor.

Now, when I click on this part, I'd like to make it selected and when I release the mouse cursor, to unselect it.

Does anyone know how to achieve this please ?

Thank you very much.