Name
HaveVolume -- check if a volume exists in the system (V8.0)
Synopsis
r = HaveVolume(vol$)
Function
This function can be used to check if the volume specified by vol$ is currently available. This is especially useful on AmigaOS and compatible systems because it will suppress the "Please insert volume XXX into any drive" system requester that usually pops up on AmigaOS systems when trying to access non-existent volumes. By checking the existence of the volume using this command first, you can easily get rid of the annoying requester on AmigaOS.

Inputs
vol$
name of a DOS volume whose presence should be checked
Results
r
True if volume exists, False otherwise
Example
Print(HaveVolume("FOOBAR:"))
The code above should return 0 because the specified typically doesn't exist. On AmigaOS, there will be no system requester asking for volume "FOOBAR:" if you use this code.
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