I have dell vostro 3500 and I need to connect it to a Desktop Monitor.
I want to be able to see same page on my laptop screen and Desktop Monitor at the same time using laptop CPU. I hope I'm making sense. To make it clear here is the point.

I want to to be able to see pdf book in desktop monitor while coding in my laptop at the same time. What cables shall I buy and how shall i Connect. help will be appreciated.

Usually you just need to connect your monitor's vga cable to the laptop vga port and you could download and install an additional tool like Ultramon for dual monitor purposes