Provide Variables From Main To All Other Classes?

I have a need to provide mouse coordinates and click details to the sub-classes of an application. The details are stored in a typed variable in the main class, as they are not processed when the event occurs.

What is the correct way of getting the classes to refer to variables in the parent class that instigated them? I realise this is not standard practise, but at this stage in the project I am converting code from a procedural language and need to do this as an intermediary step. Using the mouse events is also not possible, as this is a DirectX-oriented real-time program, and some things still have to be processed procedurally. They have to be stored via the event and then processed manually.

I may have dozens of instances of the classes, so distributing the mouse data every time it changes is not a good option. Ideally, the class should be able to retrieve the data when it needs it.