Alexey,
Thank you very much for your answer. It worked great with the addition
of the out modifier on the argument.
Cheers
Joe
> I am having problems with my c# wrapper for sipxtapi that is based on
> the VB one on the SIPfoundary site. My code is producing the
following
> exception "Attempted to read or write protected memory. This is often
an
> indication that other memory is corrupt." This happens when I call the
> sipxAudioGetOutputDevice via the following DLLImport statement and it
is
> the last argument that is causing the problem.
try like this (this is part of SipxCall wrapper for sipXtapi by Jaroslav
Libak):
...
using SIPX_CALL = System.IntPtr;
...
[DllImport(SIPXTAPI_DLL, SetLastError = true, CallingConvention =
CallingConvention.Cdecl, EntryPoint = "sipxCallGetContactID")]
public extern static SIPX_RESULT sipxCallGetContactID(SIPX_CALL hCall,
IntPtr szContactAddress, uint iMaxLength);
...
public string ContactID
{
get
{
IntPtr buf = Marshal.AllocCoTaskMem(255);
try
{
if (SipxInterop.sipxCallGetContactID(this.CallHandle, buf,
255) == SIPX_RESULT.SIPX_RESULT_SUCCESS)
return Marshal.PtrToStringAnsi(buf);
else
return String.Empty;
}
finally
{
Marshal.FreeCoTaskMem(buf);
}
}
}
--
Best regards,
Alexey [ [EMAIL PROTECTED] ]
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