Function BCryptSignHash 

pub unsafe extern "C" fn BCryptSignHash(
    hKey: BCRYPT_KEY_HANDLE,
    pPaddingInfo: *mut c_void,
    pbInput: PUCHAR,
    cbInput: ULONG,
    pbOutput: PUCHAR,
    cbOutput: ULONG,
    pcbResult: *mut ULONG,
    dwFlags: ULONG,
) -> NTSTATUS