How to simulate a click on certain coordinates when a certain button is clicked?

Question

C++ / C#

How to "mouse click" on certain XY screen coordinates when pressing a certain key, for example, ctrl?
In any of the languages: C,C++,C#

Answer 1

C#
https://github.com/gmamaladze/globalmousekeyhook/b...

Answer 2

I would connect an arduino duo, change the bootloader firmware to * lufa and display a button on the duo. When you click on the button, the duina pretends to be a mouse and sends the desired signal