Such as 连点器:

#include<bits/stdc++.h>
#include<Windows.h>
#define KEY_DOWN(VK_NONAME) ((GetAsyncKeyState(VK_NONAME) & 0x8000) ? 1:0) 
using namespace std;
int m;
signed main()
{
	cout<<"输入间隔时间(ms)：";
	cin>>m;
	while(1)
	{
		if(KEY_DOWN(VK_INSERT))
		{
			while(!KEY_DOWN(VK_DELETE))
			{
				mouse_event(MOUSEEVENTF_LEFTDOWN|MOUSEEVENTF_LEFTDOWN,0,0,0,0);
				Sleep(m);
			}
		}
		Sleep(10);
	}
	return 0;
}