ActivatePackage(control); question

OK minus some comments out of the book in the emaga4 and 5 examples now Im having a problem with package here it is


package control {

function OnStart()
//------------------------------------------------------------------------
// Called by root main when package is loaded
//------------------------------------------------------------------------
{
Parent::OnStart();
Echo("\n--------- Initializing control module ---------");

Exec("./initialize.cs");
InitializeServer(); // Prepare the server-specific aspects
InitializeClient(); // Prepare the client-specific aspects
}

function OnExit()
//------------------------------------------------------------------------
// Called by root main when package is unloaded
//------------------------------------------------------------------------
{

Parent::onExit();
}

}; // Client package

ActivatePackage(control); // Tell TGE to make the client package active


Now here is my question why must I make the activate the package? Wouldn't it just been simpler to skip the package control all togther and just leave the functions as be? Well I tried that I commented out the package control and the game just keeps crashing, oviously the package needs to be activated. So I defualt to what the books says " //tell TGE to make the client package active" I read that part in comments and I read that part in the book but I just dont it the only thing I can guess at what it does is that it forces the functions to execute without an actuall function call. Now Im sure I might be wrong with my hypothesis, but I'm tryig to get a deep understanding of the code and I'm not 100% clear what is happing with that part of the code.

So to sum it all up when you ActivatePackage(control); is execueted what is going on behing the curtains?

thank you in advance to any help I'm tying to get a deeper understaing of the code that I read.