1:if exist G:\nul.ext (echo disc present) else (echo no disc)
What does nul.ext mean here, and why can it be used for detection?
2:if exist \\?\CdRom0\* (echo OK) else (echo NO) what does \\?\CdRom0\* mean
Also, is it a CMD command? How do you use it?
What does nul.ext mean here, and why can it be used for detection?
2:if exist \\?\CdRom0\* (echo OK) else (echo NO) what does \\?\CdRom0\* mean
Also, is it a CMD command? How do you use it?