i made program with "Drive List" but when i run it the user can easily
choose say floppy drive and it causes error "Device Unavailable" if no disketts are in the drive or no disks in the cd-rom
i want to know 2 things
1.how to remove for example floppy drive from the drive list!
2.let's not remove it ,how can i make a error myself ,if device is not
available and after the error we are back to proram not letting to quit
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