Creating UI inside transmitterPlugin.cpp

Hi, I had two questions regarding transmitterPLugin. I am trying to create a plugin that would transmit data from premier pro source monitor on to a external hardware device.

1) I can use the MessageBox to create a normal window from the above code, but how do I create a UI like premier pro has inside the above function ? Is there any documentation on how to create UI using C++ ?

   Or do I need a create a Javascript UI file which is used by the C++ plugin when it loads ?

2) The SDK documentation mentions this :

Clicking on the Transmit Invocation Suite does not give any useful information. I also checked out an earlier post on this https://forums.adobe.com/thread/1179336

Could Adobe please explain on how can I get the Transmit invocation suite to work. For example ,assume I should create a video filter which if the user adds to the clip, it should

send the entire timeline to the external hardware, how do I use the SDK example files in order to achieve this ? Should I export a Video_filer plugin and a Transmitter plugin or should

I add the source code from both these into one ? It would be helpful to understand this workflow since there are no examples related to this in the SDK.

Thanks