Question

I’m trying to invoke on dll method from an ASP.net web. It’s working on a W2003 server but the same dll and the same web is crashing on w2008 server R2 with IIS 7.5.I’m doing like this to import the dll:

<DllImport("Cripto.dll")> _
        Public Shared Function DesCipher(ByVal uiMode As Integer, ByVal uiLength As        Integer, ByVal szSourceData As String) As String

End Function

I have tried a 64 bits dll compile but the problem remains.

I’m going mad…

Please Help!

Answer 1

Finally I have found the clue.
It is a memory location problem. The main function was returning an array like this:
char retorno[10000];

The function was declared in the dll code as “char*”

By changing these lines:

     ULONG  ulSize = strlen((char*)retorno) + sizeof(char);
     char*  pszReturn = NULL;
     pszReturn = (char*)::GlobalAlloc(GMEM_FIXED, ulSize);
     strcpy(pszReturn, (char*)retorno);
     return pszReturn;

instead of
return ((char *)retorno)

Now it’s working.