The ptree_get_propval() function gets the value of the property specified by the handle proph and copies it into the buffer specified by valbuf. The size of the buffer valbuf is specifed in nbytes.
The ptree_get_propval_by_name() function gets the value of the property, whose name is specified by name, from the node specified by handle nodeh. The value is copied into the buffer specified by valbuf. The
size of the buffer is specified by nbytes.
For volatile properties, the read access function provided by the plug-in publishing the property is invoked.
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