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//0x4 bytes (sizeof)
enum _TPM_BOOT_ENTROPY_RESULT_CODE
{
    TpmBootEntropyStructureUninitialized = 0,
    TpmBootEntropyDisabledByPolicy = 1,
    TpmBootEntropyNoTpmFound = 2,
    TpmBootEntropyTpmError = 3,
    TpmBootEntropySuccess = 4
};