C# Signature:

[DllImport("crypt32.dll", SetLastError=true)]
        public static extern bool CryptMsgGetParam(
            IntPtr hCryptMsg,
            uint dwParamType,
            int dwIndex,
            IntPtr pvData,
            ref uint pcbData
            );

        [DllImport("crypt32.dll", SetLastError=true)]
        public static extern bool CryptMsgGetParam(
            IntPtr hCryptMsg,
            uint dwParamType,
            int dwIndex,
            [In, Out] byte[] pvData,
            ref int pcbData
            );

        [DllImport("crypt32.dll", SetLastError=true)]
        public static extern bool CryptMsgGetParam(
            IntPtr hCryptMsg,
            uint dwParamType,
            int dwIndex,
            ref uint pvData,
            ref uint pcbData
            );

VB Signature:

User-Defined Types:

None.

Alternative Managed API:

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Notes:

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