Please excuse noob question, but I need to know how to include a source file into another. For example I have this simple program:

int myVar;

void setVar() {
 myVar = 10;
}

void setup() {
 setVar();
 println(myVar);
}

And I would like to move the variable declaration and first function into another file. So the result will be:

** file mylib.txt: **
int myVar;

void setVar() {
 myVar = 10;
}

and
** file myprog.pde: **
__some include statement__

void setup() {
 setVar();
 println(myVar);
}

thanks