We are a hardware manufacturer that requires a graphical user interface to be developed on Windows, ideally in c# but we are flexible. The interface we are seeking is similar to a timeline environment often provided with video editing tools. A .DLL will be provided by us in C++ that interfaces to the hardware. There are only about 15 or so functions in the .DLL as interfacing to the hardware is fairly straight forward. Our team will of course be at your disposal to assist with any interfacing challenges and questions.
Please see this video here for a product called Venue Magic which provides a similar interface to what we are looking for.
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Don't hesitate to ask any follow-up questions about the requirements.