static extern bool IsOS(OSType dwOS);

Private Shared Function IsOS(UInt32 dwOS) As _

Declare Function IsOS Lib "shlwapi.dll" (TODO dwOS) As TODO

/// Options for IsOS() function

     /// are supported at this time. IsOS(Windows) returns false on all supported

    public static PropertyKey PKEY_Photo_ISOSpeed = new PropertyKey( 0x14B81DA1, 0x0135, 0x4D31, 0x96, 0xD9, 0x6C, 0xBF, 0xC9, 0x67, 0x1A, 0x99, 34855);