Represents a rectangular area of a page.
typedef struct _NPRect
The data structure has the following fields:
top, left, bottom, right
Top, left side, bottom, and right side of the rectangle.
NPRect defines the bounding box of the area of the plug-in window to be updated, painted, invalidated, or clipped to.
NPN_ForceRedraw, NPN_InvalidateRect, NPN_InvalidateRegion, NP_Region, NPWindow