UMG: Capturing mouse events on the entire screen?

I have a UMG widget where I can drag a small pointer image around an area. The image itself will never go outside the area, but I still want to get mouse events (movement, and releasing the button) from outside the area so I can put the pointer on the border if the user drags it outside. (the functionality I want is similar to the Color Picker widget)

Right now I’m overriding these functions in my widget:

These events only fire when the mouse is inside the boundaries of the widget. How do I capture mouse events from the entire screen?

The functionality I want is also similar to a slider: Once you’ve clicked on it, it captures all mouse movement and the OnMouseButtonUp, no matter where the mouse has moved.

Look under Widget -> Event Reply.
You will see options for Lock Mouse, Set User Focus & Capture Mouse.

Thanks! Capture mouse is actually the only one I need (I already focus the widget when I bring it up and I don’t want the mouse locked) but that works great!