Is it possible to program DB-15 pins (especially pin 12 which is for data) ? If yes, how to program the pins in C/C++

 

There is a big gap between DB-15 and C. Do you mean an RS-232 serial port? On what hardware?

 

I have a whole boxful. There is no way to program these things except jumper one pin to another.

 

I agree something is missing here. What kind of type port/data interface are we talking about.

 

I agree something is missing here. What kind of type port/data interface are we talking about.

Maybe an old joystick / game port. You could do different things with them by accessing the hardware directly. Don't know if any support for that these days.

 

Is it possible to program DB-15 pins (especially pin 12 which is for data) ? If yes, how to program the pins in C/C++

This is like someone asking you if they can control their foot massager and, if yes, how to do it with their i-Phone. How would you even start to answer a question like that.

A DB-15 is just a physical connector. Nothing more. So this tells us nothing.

What is this DB-15 the connector for? The only thing that comes to my mind that is close would be the DE-15 connector used for VGA ports.