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    <p>You can use the <a href="http://msdn.microsoft.com/en-us/library/aa394582%28VS.85%29.aspx" rel="nofollow noreferrer">WMI</a> class <a href="http://msdn.microsoft.com/en-us/library/aa394132%28VS.85%29.aspx" rel="nofollow noreferrer">Win32_DiskDrive</a>. if you need get info about the logical drive you can query the wmi with something like this</p> <pre><code>Select * Win32_LogicalDisk where DriveType = 2 </code></pre> <p>to access the <a href="http://msdn.microsoft.com/en-us/library/aa394582%28VS.85%29.aspx" rel="nofollow noreferrer">WMI</a> from delphi you must import the Microsoft WMIScripting V1.x Library using Component->Import Component->Import type library->Next->"Select the library"->Next->Add unit to project->Finish.</p> <p>if you need more info about usb devices you can check also the next classes</p> <ul> <li><a href="http://msdn.microsoft.com/en-us/library/aa394505%28VS.85%29.aspx" rel="nofollow noreferrer">Win32_USBControllerDevice</a></li> <li><a href="http://msdn.microsoft.com/en-us/library/aa394353%28VS.85%29.aspx" rel="nofollow noreferrer">Win32_PnPEntity</a></li> </ul> <p>See this example (tested in Delphi 2007 and Windows 7)</p> <pre><code>program GetWMI_USBConnectedInfo; {$APPTYPE CONSOLE} uses Classes, ActiveX, Variants, SysUtils, WbemScripting_TLB in '..\..\..\Documents\RAD Studio\5.0\Imports\WbemScripting_TLB.pas'; procedure GetUSBDiskDriveInfo; var WMIServices : ISWbemServices; Root : ISWbemObjectSet; Item : Variant; i : Integer; StrDeviceUSBName: String; begin WMIServices := CoSWbemLocator.Create.ConnectServer('.', 'root\cimv2','', '', '', '', 0, nil); Root := WMIServices.ExecQuery('Select * From Win32_DiskDrive Where InterfaceType="USB"','WQL', 0, nil);//more info in http://msdn.microsoft.com/en-us/library/aa394132%28VS.85%29.aspx for i := 0 to Root.Count - 1 do begin Item := Root.ItemIndex(i); Writeln('Caption '+VarToStr(Item.Caption)); Writeln('DeviceID '+VarToStr(Item.DeviceID)); Writeln('FirmwareRevision '+VarToStr(Item.FirmwareRevision)); Writeln('Manufacturer '+VarToStr(Item.Manufacturer)); Writeln('Model '+VarToStr(Item.Model)); Writeln('PNPDeviceID '+VarToStr(Item.PNPDeviceID)); Writeln('Status '+VarToStr(Item.Status)); End; end; begin try CoInitialize(nil); GetUSBDiskDriveInfo; Readln; CoUninitialize; except on E:Exception do Begin CoUninitialize; Writeln(E.Classname, ': ', E.Message); Readln; End; end; end. </code></pre>
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    1. POGetting connected USB info with Delphi on Vista
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    1. USRRUZ
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    1. CO@RRUZ: This is highly useful. I see in my IDE (Delphi 7, Windows 7) that this Active X control is not listed. Do I need a special SDK? Thanks, Brian.
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      1. USBrian Frost
    2. CO@Brian, you must check in the option "Import type library" (not activex) and search in the list "Microsoft WMI Scripting V1.2 Library"
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    3. COThis is really useful. Thanks a lot.
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