Programatically controlling "Print" dialog??

[trint]

Since we have a laserjet 4350tn with 4 paper trays, the .dll from hp of
course adds to to funtionality (like being able to select a paper tray
under one of the tabs) to the "Print" dialog. I want to know how to
get manipulate that within my c# app.
Manual selection is:
"Print"
select -> Paper/Quality (tab)
then select -> Source Is: (ComboListBox)
How can I do this in the following code?
if(m_numberOfPa ges < 1)
return false;
PrinterSettings printerSettings = new PrinterSettings ();
printerSettings .MaximumPage = m_numberOfPages ;
printerSettings .MinimumPage = 1;
printerSettings .PrintRange = PrintRange.Some Pages;
printerSettings .FromPage = 1;
printerSettings .ToPage = m_numberOfPages ;
printerSettings .PrinterName = printerName;
// printerSettings .PaperSource.To String = ("Tray 2");<<Here?? ?
PrintDocument pd = new PrintDocument() ;
m_currentPrinti ngPage = 1;
m_lastPrintingP age = m_numberOfPages ;
pd.PrinterSetti ngs = printerSettings ;
This is very helpful if you can figure it out.
Thanks,
Trint