what is a user pointer

[Peter Jay Salzman]

i've been reading the panel man pages and playing around with all the
functions tonight.

the man pages make reference to a panel's user pointer which you can get
and set with the panel_userptr() and set_panel_userptr() functions.

however, the man pages don't explain what a user pointer is.

the header file didn't give much of a clue either, other than the fact
that there's a member of the PANEL structure called user which is a
generic pointer.

can someone explain what this pointer is?  are these functions used
mainly for the development of the panel library?  or is there a use for
them?

pete

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