The DOSBox Microsoft DOS emulator lets you run older DOS applications and games on Windows and Linux platforms. It is freely available and open source. Many older DOS applications have been abandoned; consequently, they are no longer capable of running natively in Windows XP, Windows Vista and Windows 7 and require DOSBox to function. If you have text output in your DOS window that you want to copy, you must use keyboard commands to perform copy and paste functions.
Select the text you would like to copy inside the DOSBox window using your mouse.
Press "Ctrl"+"C" to copy the text to the clipboard.
Press "Ctrl"+"V" to paste the text from the clipboard.
Windows users can also use "Shift"+"Insert" to paste.