I am confused about how I get info about writing a custom DLL for NT7, etc. I see many 3rd party add-ons that seem to access information that is not available in NinjaScript, and I don't know how they do this or where to find documentation about how to do this. Forgive me, but I am a bit confused.
Just to make things simple, I would like to answer the following question just to find out more about this process:
- How would I create a DLL that prints to the Output window the volume of sellers lined up at the price 3 ticks higher than the current Ask Price for a futures contract? (This would require accessing information that is not available in NinjaScript but that I have seen certain 3rd party indicators access through custom/external dll's.)
Any links to relevant info/documentation about this topic are also greatly appreciated as these would help me to get started on researching things for myself. As it stands now, I don't even know where to look to try and do my own research on the topic.
Thanks in advance for any help with my questions.

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