Groups > comp.lang.basic.visual.misc > #178

Re: Need help with writing drive property: Possible solution

From	GS <gs@somewhere.net>
Newsgroups	comp.lang.basic.visual.misc, microsoft.public.vb.general.discussion
Subject	Re: Need help with writing drive property: Possible solution
Date	2011-05-22 14:29 -0400
Organization	A noiseless patient Spider
Message-ID	<irbkgl$23g$1@dont-email.me> (permalink)
References	(1 earlier) <ir9gm7$mgl$1@dont-email.me> <ir9i00$t2k$1@dont-email.me> <ir9vnu$veo$1@dont-email.me> <ira8ut$6u3$1@dont-email.me> <irb1ho$7as$1@dont-email.me>

Cross-posted to 2 groups.

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MikeD was thinking very hard :
>
> "GS" <gs@somewhere.net> wrote in message news:ira8ut$6u3$1@dont-email.me...
>> I've determined that WMI Win32_DiskDrive provides the Index for each drive. 
>> Also, I can filter it on InterfaceType "USB".
>>
>> The Index appears to be the drive's position in the Drives enumerated by 
>> "DiskDrive" according to the order the drives were 'plugged in'. This 
>> indexing appears to not include "CD-ROM" drives.
>>
>> I need to test this on several machines but it seems feasible to use FSO to 
>> iterate its Drives collection and filter for DriveType "1,2" and put the 
>> DriveLetter into an array. Then build the target drives path by getting the 
>> drive letter from the array using "DiskDrive.Index".
>>
>> Does anyone foresee any pitfalls in the solution?
>
>
> Besides using FSO?  Consider using GetLogicalDrives or GetLogicalDriveStrings 
> and GetDriveType Win32 API functions.  You might also be able to use 
> DeviceIoControl or some other API function rather than WMI. As Mayanana said, 
> WMI is a service and there is always a risk that it's been disabled or 
> otherwise not running.

Thanks, Mike. Yes, I was looking for an API alternative here. I agree 
with Mayayana about using WMI service and so is why I started this 
post.

I'll look at the APIs you suggested and see if they will meet my needs.

>
> You might want to explain in more detail what you're really doing all this 
> for.  So far, you've only said "I was looking for a way to let users choose a 
> removeable drive to install an app that requires portable licensing to work 
> with the USB device". I have no idea what that means and I'd guess nobody 
> else does either. There might very well be an entirely different, and better, 
> approach to doing whatever it is.

Some of my apps can be 'portable' in that they can be 
installed/licensed to a USB memstik or USB external drive. It's a 
hardware locked licensing scheme I use and so I need to get USB Device 
info from the target drive. Going this route is at the user's option 
and so they must select the USB drive they wish to use. (My licensing 
scheme allows for 2 'seats' by default<g>)

-- 
Garry

Free usenet access at http://www.eternal-september.org
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Need help with writing drive property GS <gs@somewhere.net> - 2011-05-21 16:54 -0400
  Re: Need help with writing drive property "Mayayana" <mayayana@invalid.nospam> - 2011-05-21 19:10 -0400
    Re: Need help with writing drive property GS <gs@somewhere.net> - 2011-05-21 19:35 -0400
      Re: Need help with writing drive property "Mayayana" <mayayana@invalid.nospam> - 2011-05-21 23:27 -0400
        Re: Need help with writing drive property GS <gs@somewhere.net> - 2011-05-22 00:49 -0400
          Re: Need help with writing drive property GS <gs@somewhere.net> - 2011-05-22 00:58 -0400
        Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 02:07 -0400
          Re: Need help with writing drive property: Possible solution "MikeD" <nobody@nowhere.edu> - 2011-05-22 09:02 -0400
            Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 14:29 -0400
              Re: Need help with writing drive property: Possible solution "MikeD" <nobody@nowhere.edu> - 2011-05-22 17:01 -0400
                Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 18:28 -0400
                Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 18:29 -0400
                Re: [OT] Bolding text. Dee Earley <dee.earley@icode.co.uk> - 2011-05-23 10:54 +0100
                Re: [OT] Bolding text. "Jim Mack" <no-uce-ube@mdxi.com> - 2011-05-23 09:33 -0400
                Re: [OT] Bolding text. Helmut_Meukel <Helmut_Meukel@bn-hof.invalid> - 2011-05-23 17:48 +0200
                Re: [OT] Bolding text. Helmut_Meukel <Helmut_Meukel@bn-hof.invalid> - 2011-05-23 18:00 +0200
                Re: [OT] Bolding text. Dee Earley <dee.earley@icode.co.uk> - 2011-05-24 10:44 +0100
                Re: Need help with writing drive property: Possible solution "MikeD" <nobody@nowhere.edu> - 2011-05-23 08:51 -0400
                Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-23 10:48 -0400
          Re: Need help with writing drive property: Possible solution "Mayayana" <mayayana@invalid.nospam> - 2011-05-22 09:23 -0400
            Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 14:36 -0400
            Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 14:49 -0400
            Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 16:26 -0400
              Re: Need help with writing drive property: Possible solution "Mayayana" <mayayana@invalid.nospam> - 2011-05-22 18:29 -0400
                Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 18:33 -0400
              Re: Need help with writing drive property: Possible solution "Mayayana" <mayayana@invalid.nospam> - 2011-05-22 18:36 -0400
                Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 18:49 -0400
                Re: Need help with writing drive property: Possible solution "Mayayana" <mayayana@invalid.nospam> - 2011-05-22 20:48 -0400
                Re: Need help with writing drive property: Possible solution GS <gs@somewhere.net> - 2011-05-22 21:30 -0400
  Re: Need help with writing drive property "MikeD" <nobody@nowhere.edu> - 2011-05-21 19:42 -0400
    Re: Need help with writing drive property GS <gs@somewhere.net> - 2011-05-21 20:14 -0400
  Re: Need help with writing drive property - Final Approach GS <gs@somewhere.net> - 2011-05-23 13:20 -0400

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