Multi GUI VST like Access Virus TI

I need a Multi GUI VST example, that has 5 tabs with 5 different window synth settings, like 1. osc, 2. filter, 3. envelopes, 4. effects, 5. modulation. Each window has 1 knob, 1 button, 1 slider, 1 OnOff switch, 1 display and all of these controls have midi learn. Very well documented and clear C++ VST for best understanding. If this way is a wrong way of doing multiple GUI in VST environment, please show me the correct way. I need anything such as Access Virus TI Vst GUI.