"bosxfan2005" wrote:

> Hello,
>
> I developed a class in VB.Net that provides encryption/decryption methods.
> It is to be used as a COM object from a ColdFusion program. I compiled the
> class with the "Register for COM Interop" set and registered the DLL on the
> ColdFusion server using RegAsm.exe. When the class' encrypt method is called
> from CF I get this error:
>
> Error on Invoke for:
> COM error 0x80070057. The parameter is incorrect.
>
> I also created a Windows test program that uses CreateObject to instantiate
> the COM component and calls the encrypt and decrypt methods. This works fine
> on the CF server and leads me to believe that the DLL is registered correctly
> and that the methods are working.
>
> Here is the structure of the VB.Net class. (I am implementing an interface
> as suggested by the QuickStart Tutorial, although not using an interface
> gives the same error):
>
> Public Class CryptoCOM
> Implements ICryptoCOM
>
> Public Sub New()
> End Sub
>
> Public Function Encrypt(ByVal PlainText As String) As String Implements
> ICryptoCOM.Encrypt
> (code omitted)
> End Function
>
> Public Function Decrypt(ByVal CypherText As String) As String Implements
> ICryptoCOM.Decrypt
> (code omitted)
> End Function
>
> End Class
>
> Public Interface ICryptoCOM
> Function Encrypt(ByVal PlainText As String) As String
> Function Decrypt(ByVal CypherText As String) As String
> End Interface
>
> Here is part the CF code:
>
> <cfobject type="COM" class="<qualified>Security.CryptoCOM" action="Create"
> name="CryptoCOM" >
> <cfset userencrypted = CryptoCOM.Encrypt("username") >
>
> It seems that everything is set up correctly and this should work without a
> problem. I'm not sure whether this is a COM, ColdFusion or .Net (doubt it)
> issue. But, I'm stumped. Any help is greatly appreciated.
>
> Thanks.