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crypthashdata (advapi32)
The CryptHashData function adds data to a specified hash object. This function and CryptHashSessionKey can be called multiple times to compute the hash of long or discontinuous data streams. Before calling this function, CryptCreateHash must be called to create a handle of a hash object.

C# Signature:

  [DllImport("advapi32.dll", SetLastError=true)]
  public static extern bool CryptHashData(IntPtr hHash, byte[] pbData, uint dataLen, uint flags);

VB Signature:

     Friend Declare Function CryptHashData Lib "advapi32.dll"(ByVal hHash As IntPtr, ByVal pbData As Byte(), ByVal dwDataLen As Integer, ByVal dwFlags As Integer) As <MarshalAs(UnmanagedType.Bool)> Boolean

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