How could I get a USB Flash disk's drive letter?

Posted: 01-26-2007, 04:08 AM

ChuYuan

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In XP, I used these functions to get a usb device volume to compare, but it
cannot work in Vista
SetupDiGetClassDev ==> get GUID_DEVINTERFACE_VOLUME device
SetupDiEnumDeviceInterface ==> get all volume device
CM_Get_Parent twice ==> get device id for USB
GetVolumeNameForVolumeMountPoint ==> compare

Might anybody help me?
Thx,

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Responses to "How could I get a USB Flash disk's drive letter?"

Uwe Sieber

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Re: How could I get a USB Flash disk's drive letter?

Posted: 01-26-2007, 11:58 AM

ChuYuan wrote:

> In XP, I used these functions to get a usb device volume to compare, but it
> cannot work in Vista
> SetupDiGetClassDev ==> get GUID_DEVINTERFACE_VOLUME device
> SetupDiEnumDeviceInterface ==> get all volume device
> CM_Get_Parent twice ==> get device id for USB
> GetVolumeNameForVolumeMountPoint ==> compare
>
> Might anybody help me?

Yes, this has changed in Vista. DRIVE_REMOVABLE drives are now handled
as DRIVE_FIXED drives are under XP.
Have a look at my sample project, it explains it:
http://www.codeproject.com/system/Re...veByLetter.asp

Uwe

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