Obtaining system menu for file

Hi,

Can you tell me how to obtain the system menu for a file, e.g. I right-click
on file in stringlist/listview and system menu comes up (open, copy, delete,
properties etc..).

I know there are controls available that make it easy to do this, but I was
hoping someone can give me a simple overview of the process "from the ground
up". Perhaps it's a simple function call?

Bowda