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Check CDROM has a cd in it

Posted on 2001-09-04
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Last Modified: 2013-12-03
i have a function in VB to get all cd rom drives and list them, how can i make sure it has a cd in it before listing all files etc?
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Question by:Kunt
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Expert Comment

by:Zoppo
ID: 6456608
Hi Kunt,

you could simply call some function which fails if no cd is in drive, i.e. GetDiskFreeSpace.

ZOPPO
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Author Comment

by:Kunt
ID: 6459119
yeh, thats what i already do, i was wondering if there is nice tidy function for it?
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LVL 31

Expert Comment

by:Zoppo
ID: 6459768
well, I didn't find an extra function for this ... some samples use something like

HANDLE  hCD;
hCD = CreateFile ("\\\\.\\F:", GENERIC_READ,
 FILE_SHARE_READ|FILE_SHARE_WRITE,
 NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
 NULL);
if (hCD != INVALID_HANDLE_VALUE)
{
 // ok, disk in drive...
}
CloseHandle (hCD);

further I found you can handle message WM_DEVICECHANGE which is sent
to top-level windows whenever a disk is inserted/removed and some other
reasons.

ZOPPO      
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