Orders for design development - C++ - new

Hello Need IBKR c++ API solution to add a bit of extra capability in area of trailing stop and unlimited GTC. C++ API for IBKR none negotiable, this not python project. For trailing user will fill in a simple table that says what trailing distance should be at given distance from initial stop price. This table is about 6 long max. For each order. For unlimited GTC, due to fact that IBKR cancels pending orders after