Mouse Clicking

[DKB]

Hey, so I just was making a program that basically makes the mouse click, cause i thought it would be cool to get a few thousand clicks on that facebook clicking game. The code I have right now is the following:

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

using namespace std;

int main(){
    SetCursorPos(100, 400);
    for(int i=0; i<200000; ++i)
    {
    mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);}
    return 0;
}    

What I was thinking is instead of doing ++i to simply make this function execute for 30 seconds. I figured this might allow me to get more clicks (is that even true?) and that way it would stop clicking after 30 seconds. However, I don't really have an idea how to go about this... I did some searching and came across the time_t function but don't really know how to incorporate it from there. Help as always is greatly appreciated :)

[Reguba]

Off topic and of no help but I want to add. Just about an hour ago I saw the clicking game on Facebook and this was the first thing that came to my mind.

[helios]

GetTickCount() returns the number of milliseconds the program has been running.