A few gui questions for a game script

[TheMna]

I'd like to implement a sort of splash gui that I can show/hide while a game (Guild Wars) is in fullscreen mode. A few things I'd like to look into include:

Getting the gui to show up in fullscreen mode (even tooltips barely display in fullscreen mode; they flicker)

Having the gui show up as a sort of splash menu

[Paulie]

To get anything to display over a fullscreen DirectX game, i'm pretty sure it has to hook the directX API for that game. Don't ask me how to do that though muttley