Locks a layer for exclusive access by this task. A layer can be locked multiple times but has to be unlocked as many times as it has been locked so that other tasks can access it.
INPUTS
layer
pointer to layer to be locked
RESULT
EXAMPLE
SEE ALSO
NOTES
BUGS
INTERNALS
HISTORY
20.02.1999 bergers
Added text to autodocs. Bugfixes. Fixed some typos in docs.