Music Shield pins D0-D9 - How to use for my own application?

Hi~
Because there has a function to check for the key,so there is the problem.
You can fine the void AvailableProcessorTime() funtion in the player.cpp,and there has the CheckKey();funtion,what should we do is Note it,just like this:

[code]void AvailableProcessorTime()
{

do
{
	//CheckKey();

	 IPODCommandProcess();
	 
	if(0 == playStop)
	{
		GREEN_LED_ON();
	}	
}while(0 == playStop);

//do other things
ControlLed();

}[/code]

so now,you can use the pin by your own.