Auto clicker keyboard C++

Question

Which function give me acces to my keyboard to let him press any key ?
I found the function for the mouse : mouse_event(MOUSEEVENTF_LEFTDOWN,x,y,0,0);
This is auto clieker mouse function I need a function for the keyboard can you help me ?
Thanks you .

Answer 1

Can you explain more? What do you mean by "him" i think i could help you.

Answer 2

I need a function to let me get acces to my keyboard so I let my program get acces and let him write on other files.
I don't mean ofstream (I know how to use it)
So when I run my program, he will auto open note pade on screen (I know witch function to use) and them let him write sentences I told him about in the code.
Thanks for your help Syss
I know it's a little confusing.