Mac screen on my PC's monitor

Hello I have mac book pro and a desktop PC running windows connected to a 21 inch monitor. My question is, is there some way that I can have the Macbook Pro screen show on the monitor while still having that monitor connected to my PC? I still use my PC often so disconnecting it and reconnecting it seems inefficient, I LOVE my macbook pro but would love to use my monitor with it.

you can use your 21" montior.. if it's VGA then you just need to use the DVI-VGA adapter that it comes with
but if your trying to use that same monitor while connected to your windows machine and some how magically teleport over to the mac at the sametime,not going to happen....
so it's either... connect the 21" display to your macbook (and just install windows on the macbook for crying out loud! LoL) or use only the windows machine.. ur call
i practically gave away the desktop I built to a friend's younger brother and kept my 17" sony trinitron.. just sits on my desk and if I'm at home, i plug in my macbook pro to it
i hope that asnwers your question? if not i can clarify if needed

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