/// Flags controlling what is included in the device information set built by SetupDiGetClassDevs

/// Flags controlling what is included in the device information set built by SetupDiGetClassDevs

IntPtr h = SetupDiGetClassDevs(ref DiskGUID, 0, IntPtr.Zero, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

Private Declare Function SetupDiGetClassDevs Lib “setupapi.dll” _

Alias “SetupDiGetClassDevsA” (GuidPtr As Long, _

PnPHandle = SetupDiGetClassDevs(PrnGuid.Data1, 0, 0, _

    // enumerating devices in class using SetupDiGetClassDevs()

        // Use the "enumerator form" of the SetupDiGetClassDevs API

        IntPtr h = SetupDiGetClassDevs(0, DevEnum, IntPtr.Zero, DIGCF_PRESENT | DIGCF_ALLCLASSES);

    public static extern IntPtr SetupDiGetClassDevs(ref Guid classGuid, IntPtr enumerator, IntPtr hwndParent, UInt32 flags);

IntPtr h = SetupDiGetClassDevs(ref DiskGUID, 0, IntPtr.Zero, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

static extern IntPtr SetupDiGetClassDevs(

This signature has the drawback that it does not allow passing a null pointer as the first parameter, which is one of the common usages cited at [SetupDiGetClassDevs]: "To return devices for all device setup classes, set the DIGCF_ALLCLASSES flag, and set the ClassGuid parameter to NULL."

static extern IntPtr SetupDiGetClassDevs(           // 1st form using a ClassGUID only, with null Enumerator

static extern IntPtr SetupDiGetClassDevs(

    EntryPoint:="SetupDiGetClassDevsW", _

    Private Shared Function SetupDiGetClassDevs( _

    EntryPoint:="SetupDiGetClassDevsW", _

    Private Shared Function SetupDiGetClassDevs( _

Public Declare Auto Function SetupDiGetClassDevs Lib "setupapi.dll" Alias "SetupDiGetClassDevsW" ( _

IntPtr h = SetupDiGetClassDevs(ref DiskGUID, IntPtr.Zero, IntPtr.Zero, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

        // Use the "enumerator form" of the SetupDiGetClassDevs API

        IntPtr h = SetupDiGetClassDevs(0, DevEnum, IntPtr.Zero, DIGCF_PRESENT | DIGCF_ALLCLASSES);

IntPtr h = SetupDiGetClassDevs(ref DiskGUID, 0, IntPtr.Zero, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

    h = SetupDiGetClassDevs(myGuid, 0, IntPtr.Zero, DIGCF_PRESENT + DIGCF_DEVICEINTERFACE) '

IntPtr h = SetupDiGetClassDevs(ref DiskGUID, 0, IntPtr.Zero, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);