In AAX SDK there is a method to tell Protools to create a curve for a parameter. so when user hold Ctrl+Alt and click the knob, a automaion curve for this knob will create.
I find this function very useful. so can I implement this in VST3?
it seems like “IContextMenuTarget” has something to do with this function?
There is no direct interface for this but please have a look at : [3.5.0] Context Menu Support - VST - Steinberg Developer Help
each DAW host could add their own entries in the menu associated to a parameter: Cubase for example uses it to add “Show Automation Track”.