How to check CComVariant.boolval is valid and extract bool value from it

[ptr_Electron]

I want ot check CComVariant.boolval is valid and extract bool value from it

if(SUCCEEDED(m_abc->GetProperty("test", comVar)))
{
if (comVar.boolVal == VARIANT_TRUE)
{
//should enter if true and valid, but enters if invalid case as well
}
}

please help!

[bjorn_ht]

It could be that m_abc->GetProperty returns something other than a bool, so you should also check comVar.vt to see that you really have a boolean.

[Jochen Arndt]

You must also check the vt member. When expecting a boolean value, it must be VT_BOOL. When the requested property exists but did not contain a value, VT_EMPTY or VT_NULL are returned (the return type depends on the property value type).