//......first install a print document object....
PrintDocument p = new PrintDocument();
.....
.....

//-----Now attach a handler to the PrintPage "event" like under----
p.PrintPage += new PrintPageEventHandler(MyPrintHandler);
......
.........

p.print() //-----actually invoke the handler function with this call-----




//-------the handler that gets called when "p.Print()" is invoked-------------

void MyPrintHandler ( PaintEventArgs pea) {

    .........................
    Graphics g = pea.Graphics;


}