Win32_NetworkAdapterConfiguration

pInClass will be NULL if there are no input parameters to the method. What method are you trying to get that has input parameters?

Start a new thread next time - instead of reviving an 11 year old thread :)

gg

This is the section code:

BSTR MethodName = SysAllocString(L"EnableDHCP");
// BSTR MethodName = SysAllocString(L"EnableStatic");
IWbemClassObject * pInClass = NULL;
IWbemClassObject * pInInst = NULL;
IWbemClassObject * pOutInst = NULL;
IWbemClassObject * pvClass = NULL;

VARIANT pathVar;
hres = pSvc->GetObject(L"Win32_NetworkAdapterConfiguration", 0, NULL, &pvClass, NULL);

if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to query Win32_NetworkAdapterConfiguration, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}


hres = pvClass->GetMethod(MethodName, 0, &pInClass, NULL);
if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to EnableDHCP method, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}

If the method name is EnableStatic, pInClass is valid pointer. Any methods related to DHCP for exampe, ReleaseDHCPLease, will return with pInClass as NULL.

Quote:

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Originally Posted by Codeplug

pInClass will be NULL if there are no input parameters to the method. What method are you trying to get that has input parameters?

Start a new thread next time - instead of reviving an 11 year old thread :)

gg

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I found out the issue. As EnableDHCP doesn't require parameter inputs, pvClass->GetMethod(MethodName, 0, &pInClass, NULL); returns with NULL pointer for pInClass.

Quote:

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Originally Posted by z160896

This is the section code:

BSTR MethodName = SysAllocString(L"EnableDHCP");
// BSTR MethodName = SysAllocString(L"EnableStatic");
IWbemClassObject * pInClass = NULL;
IWbemClassObject * pInInst = NULL;
IWbemClassObject * pOutInst = NULL;
IWbemClassObject * pvClass = NULL;

VARIANT pathVar;
hres = pSvc->GetObject(L"Win32_NetworkAdapterConfiguration", 0, NULL, &pvClass, NULL);

if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to query Win32_NetworkAdapterConfiguration, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}


hres = pvClass->GetMethod(MethodName, 0, &pInClass, NULL);
if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to EnableDHCP method, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}

If the method name is EnableStatic, pInClass is valid pointer. Any methods related to DHCP for exampe, ReleaseDHCPLease, will return with pInClass as NULL.

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