Question

I am playing with lambda in Visual C++ 11.

void CWin32Service::RunService (__in  DWORD dwArgc, __in  LPTSTR *lpszArgv)
{

auto SvcMainptr = [this](__in  DWORD dwArgc, __in  LPTSTR *lpszArgv) -> void    {ServiceMain(  dwArgc, lpszArgv );} ;


SERVICE_TABLE_ENTRY DispatchTable[] = 
{ 
    { m_ServiceName, (LPSERVICE_MAIN_FUNCTION)SvcMainptr }, <<== Error HERE 
    { NULL, NULL } 
}; 
....
}

The error message I get is:

‘type cast’ : cannot convert from ‘CWin32Service::RunService::<lambda_22F3FB7B8C044A64>’ to ‘LPSERVICE_MAIN_FUNCTIONW’

Answer 1

That is a Win32 API that expects to take a real function pointer with an exact signature. You can’t pass a lambda or other type of function object to it.

You should be passing ServiceMain in the service dispatch table.