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Unreal Engine C++ API Reference > Runtime > UMG > Components > UWidgetInteractionComponent
Syntax
TSharedPtr< FSlateVirtualUserHandle > VirtualUser
Remarks
Represents the virtual user in slate. When this component is registered, it gets a handle to the virtual slate user it will be, so virtual slate user 0, is probably real slate user 8, as that's the first index by default that virtual users begin - the goal is to never have them overlap with real input hardware as that will likely conflict with focus states you don't actually want to change - like where the mouse and keyboard focus input (the viewport), so that things like the player controller receive standard hardware input.