Is there anyhow I can make pc camera concurrently accessible on windows?

By default subsequent references to the camera will fail if it's alr开发者_开发百科eady in use.

But is it possible to make the subsequent references read-only, but still can access the camera?

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You mean like this, but to two different programs? It can be done using a virtual camera driver.

Since you're on stackoverflow, I guess you're looking for a way to do this in code. Try reading this thread on the Microsoft discussion groups

If you aren't a programmer, you should have asked on superuser instead, but try http://shareme.com/details/virtual-webcamera-splitter.html or http://multiply1cam.info/