Generated by the pen driver component of the system when the pen moves,
forcing more packets into the input queue. Submessage of WM_PENEVENT.
Extra information encapsulating a reference to the event and the HPCM
that generated it. Applications can use the EventRefFromWpLp
macros to retrieve these values.
This message is analogous to WM_MOUSEMOVE. It provides notification that the
pen is moving. Like its mouse counterpart, PE_PENMOVE messages are coalesced so
that only a single such message exists in the application's message queue.
How-ever, the event the message represents is the first of these coalesced events,
not the last event, as is the case with WM_MOUSEMOVE.
An application need not handle this message if transition events like PE_PENUP
and PE_PENDOWN are sufficient notification. PE_PENMOVE is useful when an
application must monitor pen movement with greater frequency than PE_PENUP or
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