Hey all,

I'm having problems calling a COM object in VC++ .NET (WIN32 target). I'm
using COM smart pointers with the "#import" directive.

I'm getting an error: "Run-Time Check Failure #0 - The value of ESP was not
properly saved across a function call. This is usally a result of calling a
function declared with one calling convention with a function pointer
declared with a different calling convention."

My code is something like --

#define _WIN32_DCOM
#include "stdafx.h"
#import "si_com.dll" /* creates namespace SI_COMLib */
#define SI_ProgID "Si_com.SIWrapper"
int _tmain(int argc, _TCHAR* argv[])
{
    CoInitialize(NULL);
    SI_COMLib::ISIWrapperPtr oSI;
    oSI.CreateInstance("SI_COM.SIWrapper");
    oSI->PutWorkingDirectory("c:\\Program Files\\Cardlink\\SISv2");
    int resp = oSI->SITest(); <<== this is the offending line of code
    CoUninitialize();
    return 0;

The de{*filter*} stops in the _generated_ code --

inline int ISIWrapper::SITest ( ) {
int _result = 0;
HRESULT _hr = raw_SITest(&_result); <<== BREAKS HERE
if (FAILED(_hr)) _com_issue_errorex(_hr, this, __uuidof(this));
return _result;

Any ideas anyone, please? Is this my fault (I assume it is) ?

Thanks,

Alex.

you might check if you are using the correct proxy-stub
dll file. Which should be generated during the server
build and should get correctly registered.

value of ESP was not
Files\\Cardlink\\SISv2");