can i play flash file SWF format in Unity

How can i play flash in SWF format in Unity & how i can detect if client computer have installed Quicktime or not, if not, how to install automaticallly on player computer.Or we can settle this on server side. We are making one OOM game.

You can't play flash files in Unity. The best you can do is have both a SWF Div and a Unity Div on the same web page, occupying the same rectangle, and use javascript (web page Javascript, that is) to control which is visible at any given time.

This allows you to have a flash "front-end" such as a title screen and menu, and you can then swap to Unity when the gameplay starts, and swap back to flash when it's Game Over and time to show the scores or title screen again.