#include "ofxCore.h" #define kOfxActionBeginInstanceEdit "OfxActionBeginInstanceEdit"
handlehandle to the plug-in instance, cast to an
inArgsis redundant and is set to NULL,
outArgsis redundant and is set to NULL.
This is called when an instance is first actively edited by a user, ie: and interface is open and parameter values and input clips can be modified. It is there so that effects can create private user interface structures when necassary. Note that some hosts can have multiple editors open on the same effect instance simulateously.