I need a dll or interface that does this Excel 2003 would have several dedicated cells to would send trading signals when called upon to the Open Forex Platform. Trading signals means buy, sell, closed, and modified orders to the platform. From what I understand this can be written in C++. The Open Forex Platform is Free Trading Platform with and much much more. You can view the source code on their web site which is , If this type of dll or interface was available one could use all the power of Excel with the ease of the Charting and other features the Open Forex Platform offers. I also believe this would be a great addition to this dynamic project.