`TfpgRadioButton`
pl		OnChange
pl	ro	OnDragEnter
pl	ro	OnDragLeave
pl	ro	OnDragDrop
pl	ro	OnDragStartDetected
pl	ro	OnEnter
pl	ro	OnExit
pl	ro	OnMouseDown
pl	ro	OnMouseExit
pl	ro	OnMouseEnter
pl	ro	OnMouseMove
pl	ro	OnMouseUp
pl	ro	OnShowHint

`TfpgWidget`
		OnDragEnter
		OnDragLeave
		OnDragDrop

`TfpgWindow`

`TfpgWindowImpl`

`TfpgX11Window`

`TfpgWindowBase`

`TfpgComponent`