Merge pull request MicrosoftDocs#144 from oldnewthing/ftmbase

Incorrect instructions on how to get FtmBase

Author: Colin Robertson

docs/windows/runtimeclass-class.md

@@ -30,7 +30,7 @@ template <unsigned int classFlags, typename ...TInterfaces> class RuntimeClass;
 
 #### Parameters  
  `classFlags`  
-Optional paramater. A combination of one or more [RuntimeClassType](../windows/runtimeclasstype-enumeration.md) enumeration values.  The `__WRL_CONFIGURATION_LEGACY__` macro can be defined to change the default value of classFlags for all runtime classes in the project. If defined, RuntimeClass instances are non-agile by default. When not defined, RuntimeClass instances are agile by default. To avoid ambiguity always specify the Microsoft::WRL::FtmBase in `TInterfaces` or RuntimeClassType::InhibitFtmBase. Note, if InhibitFtmBase and FtmBase are both used the object will be agile.
+Optional paramater. A combination of one or more [RuntimeClassType](../windows/runtimeclasstype-enumeration.md) enumeration values. The `__WRL_CONFIGURATION_LEGACY__` macro can be defined to change the default value of classFlags for all runtime classes in the project. If defined, RuntimeClass instances are non-agile by default. When not defined, RuntimeClass instances are agile by default. To avoid ambiguity always specify the Microsoft::WRL::FtmBase in `TInterfaces` or RuntimeClassType::InhibitFtmBase. Note, if InhibitFtmBase and FtmBase are both used the object will be agile.
 
  `TInterfaces`  
 The list of interfaces the object implements beyond IUnknown, IInspectable or other interfaces controlled by [RuntimeClassType](../windows/runtimeclasstype-enumeration.md). It also may list other classes to be derived from, notably Microsoft::WRL::FtmBase to make the object agile and cause it to implement IMarshal.