control USB port with code on windows pc

control USB port with   code on windows pc. control RTS and CTS etc.
I have a USB to serial cable.
Any language. I normally use and compile.
Project is to turn on solenoid.
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If you have USB to Serial, then is about controlling serial port and not the USB port. USB is not so easy to be controlled, but serial is a lot easier.
USB to serial adapters installs a virtual serial port in your PC and then from software point of view you control that virtual serial port in the same manner as a hardware dedicated RS232.
One way is to use for example dedicated activex:

or for example from VBA Excel with Windows API:

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