Calling functions from other documents

[Kilroy0846]

In MPLAB, how do I call functions from other files in a project?

Here is my code:

static int counter;

counter = Get_Encoder_3_Count();

And the Get_Encoder_3_Count() function is located in the file encoder.c

Here is the function code:

long Get_Encoder_3_Count(void)
{
	long count;

	INTCONbits.RBIE = 0;

	count = Encoder_3_Count;
	
	INTCONbits.RBIE = 1;

	return(count);
}

The error that I get is:

Error - could not find definition of symbol 'Get_Encoder_3_Count' in file 'V:\frc-code-2007-8722\FrcCode_2007_8722\user_routines.o'.