[CONNECT C++] DependencyManager - How to obtain the "current" Viewport when DependencyManager handles and Event?

I'm writing a DependencyManager handler and I need to know the RotMatrix of the view where my element modification caused the DependencyManager to act. Specifically, when my Root element alters it's rotation, I need to also modify the rotation of any dependent items. I am trying to use GetCurrentDgnButtonEvent(), but I don't have any type of DgnTool active, so the compiler doesn't like me using it....

Not sure of any other way to obtain the Viewport of the cursor operation. Do I need to set up a view monitor as well in order to get this information? Might it be available from the tcb?