DrawButtonHover
From King Arthur's Gold Wiki
Draws a hover-highlighted button with a shape specified by the given rect.
As this is GUI-related it is client only - it should be wrapped in "if ( getNet().isClient() )" or be in a client-only script.
This method is part of the GUI namespace so you need to prefix calls to it with 'GUI::'.
void GUI::DrawButtonHover(const recti &rect)