List of unused drives

[JackMac4]

I've found plenty of threads and discussions pertaining to functions related to working with lists of available drives, but what I need is a list of all other drives.

I presume I could accomplish this by iterating through the alphabet and comparing the results to a list of DriveGetDrive("all"), but it seems awefully cumbersome.

Is there a better method someone could suggest? I need to find 10 available drive letters and fill an array with those results in order to do some mapping.

Thanks in advance!

[PsaltyDS]

There's a registry entry with a binary bit set for each use drive letter. It's not hard to find and that is left to the student as an exercise.

You could also just parse the results of DriveGetDrive().

[darkjohn20]

$Drives = DriveGetDrive("ALL")
$Drive_String = StringUpper(StringReplace(FormatToString($Drives), ":", ""))
$Unused_Drives = StringReplace("ABCDEFGHIJKLMNOPQRSTUVWXYZ", $Drive_String, "")
MsgBox(0, "Unused:", $Unused_Drives)

Func FormatToString($Drives)
    $String = ""
    For $D = 1 To $Drives[0]
        $String &= $Drives[$D]
    Next
    Return $String
EndFunc

This:

Gets all drives

Turns the array into a single string

removes ":" from the drives

removes the found drives from a list of a-z

Edited January 9, 2010 by darkjohn20

[darkjohn20]

To get 10 available ones, use stringleft or stringright to get 10 letters, and then string split by "". Take each of those and do something.

[GEOSoft]

Or just as simple

$UnusedDrives = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
$Drives = DriveGetDrive("All")
For $i = 1 To Ubound($Drives) -1
    $sCurrent = StringLeft($Drives[$i], 1)
    $UnusedDrives = StringReplace($UnusedDrives, $sCurrent, "")
Next
MsgBox(0, "Result", $UnusedDrives)

[darkjohn20]

That works too, I just don't like working with arrays all the time. For me it is easier to convert to a string and use that string instead of having multiple loops sometimes.

[GEOSoft]

That works too, I just don't like working with arrays all the time. For me it is easier to convert to a string and use that string instead of having multiple loops sometimes.

No matter how you slice and dice it, when you use driveGetDrive() you still need to go through the array, either with your function or _ArrayToString()

[darkjohn20]

I know, I just prefer not using a lot of ubounds to read from arrays. I'd rather get it to a string and not deal with arrays. By the way, I didn't know there was an array to string function. I kind of just made my own.

[GEOSoft]

I know, I just prefer not using a lot of ubounds to read from arrays. I'd rather get it to a string and not deal with arrays. By the way, I didn't know there was an array to string function. I kind of just made my own.

Should get used to Ubound(). I would like to see all arrays 0 based at some point in time.