How to hold down keys on the keyboard in C++?

Question

C++ / C#

How to create a keypress in C++? I do this code and it just presses and immediately releases the key:

#include <iostream>
#include <windows.h>

int main()
{
    keybd_event(0x57, 0, 0, 0);
}

Answer 1

Here's how in Delphi

procedure SimulateKeyDown(Key: Byte);
begin
  keybd_event(Key, 0, 0, 0);
end;

procedure SimulateKeyUp(Key: Byte);
begin
  keybd_event(Key, 0, KEYEVENTF_KEYUP, 0);
end;

procedure SimulateKeystroke(Key: Byte; Extra: DWORD);
begin
  keybd_event(Key, extra, 0, 0);
  keybd_event(Key, extra, KEYEVENTF_KEYUP, 0);
end;

I think everything is clear here, api is the same thing.
If there is no constant, then hereKEYEVENTF_KEYUP (0x0002)