Is it possible to change the parameters of a com port opened by a third-party program?

Question

Drivers

There is a program that uses the com-port, I want to transfer it to the network, for this I use com0com.
The problem is that due to additional delays, the program constantly falls into a communication error, although the data arrives correctly, but for a long time.
The question is, is it possible to somehow change the parameters of the com port that she opened from the outside? That is, I suppose to start with calling SetCommTimeouts or through the injection of a dll, but I don’t know how to get its pointer.
If not, then in the WDK I saw an example of a com-port driver, does it make sense to roughly speaking your own com0com in order to put a delay inside it? I didn’t have anything to do with the development of drivers from the word at all, and so far I don’t understand how SetCommTimeouts and the virtual com port driver are connected.