Let the owner know what its instance is
Get the instance associated with this owner.
Get a handle to the window structure of the owner.
This pointer cannot be made persistent by the caller.
Create a place for the plugin to live in the owner’s
environment. this may or may not create a window
depending on the windowless state of the plugin instance.
Show a status message in the host environment.
Invalidate the rectangle
Invalidate the region
Have the plugin recomposited.
Get NetscapeWindow, corresponds to NPNVnetscapeWindow
Show native context menu
Call NPP_SetWindow on the plugin.
Get the contents scale factor for the screen the plugin is
drawn on.
Get the display mode for the plugin instance.
Get the associated document.