I'm using a managed Custom Action hosting the CLR from a c++ dll using wix .
That works great except when I need to use the Custom Action more than once
cause in that case it crashes. After some debuging I found that the error
raises when I call  the method CreateDomainSetup(&pDomainSetupPunk) from
ICorRuntimeHost for the second time. My question is how can I check that the
Domain Setup hasn't been created  so I dont have to call CreateDomainSetup
and load the pDomainSetupPunk pointer?
This is my code:

CComPtr<IUnknown> pDomainSetupPunk;
CComPtr<IAppDomainSetup> pDomainSetup;
CComPtr<IUnknown> pLocalDomainPunk;
TCHAR szDirectory[MAX_PATH + 1];
// Create an AppDomainSetup with the base directory pointing to the
// location of the managed DLL. The assumption is made that the
// target assembly is located in the same directory
   
IfFailGo( m_pHost->CreateDomainSetup(&pDomainSetupPunk) );

IfFailGo( pDomainSetupPunk->QueryInterface(__uuidof(pDomainSetup),(LPVOID*)
&pDomainSetup) );