Using Win32 functions in Visual FoxPro Image Gallery
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CLSIDFromString
CoCreateGuid
CoTaskMemFree
CreateStreamOnHGlobal
GetHGlobalFromStream
StringFromGUID2
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Enumerating devices installed on the local machine

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The PnP manager maintains a device tree that keeps track of the devices in the system.


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  • Disconnecting USB Mass Storage Device programmatically
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    13923 bytes  
    Created: 2008-12-18 18:42:04  
    Modified: 2009-06-08 08:35:28  
    Visits in 7 days: 171  
    Listed functions:
    CLSIDFromString
    CM_Connect_Machine
    CM_Disconnect_Machine
    CM_Get_Child_Ex
    CM_Get_Sibling_Ex
    CM_Locate_DevNode_Ex
    SendMessage
    SetupDiDestroyClassImageList
    SetupDiGetClassImageIndex
    SetupDiGetClassImageListEx
    StringFromGUID2
    Printer friendly API declarations
    My comment:
    The device tree contains information about the devices present on the system. The PnP manager builds this tree when the machine boots, using information from drivers and other components, and updates the tree as devices are added or removed.

    The CM_Get_DevNode_Registry_Property_Ex function, while working perfectly fine, nevertheless is positioned as an outdated one by Microsoft recommending using the device installation functions (setupapi.dll) instead.

    * * *
    The DevCon command-line utility functions as an alternative to Device Manager. Using DevCon, you can enable, disable, restart, update, remove, and query individual devices or groups of devices.
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