By default, the IsCreated property is NAVHostType_exNAVHostNothing, which indicates that the NAVHost control hosts nothing. The IsCreated property specifies the type of the object the NAVHost control hosts. The Create(assemblyLocation, assemblyName) method loads the specified file, and creates the giving type. The Create method returns the same value as IsCreated property. The Destroy method unloads the hosting control. 

• The Host.Item("GetType().Name").Value gets the type of the hosting control. 
• The Host.Item("GetType().BaseType().Name").Value property gets the type of the base of the hosting control. 
• The Host.Item("GetType().IsCOMObject()").Value, property indicates if the hosting control is /COM object or a/NET assembly.
• The Host.Item("GetType().GUID()").Value.AsString, returns the GUID of the hosting control.

There are three ways of loading/creating a manifest/component/assembly as listed:

• AssemblyLocation property, loads the first public, browseable control found in the specified location. If there are more public, browseable controls in the assembly, you can use the AssemblyName or AssemblyQualifiedName property to specify the fully qualified name of the type to be hosted.
• AssemblyQualifiedName property, loads and creates the object based on the assembly-qualified name of the type, which includes the name of the assembly from which this type object was loaded. Sample: "System.Windows.Forms.ListView, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
• Create(assemblyLocation, assemblyName) method loads the specified file, and creates the giving type.

If succeeded, ( the assembly is loaded and the object is created ), the 

• IsCreated property returns the type of the object being created such as: NAVHostType_exNAVHostControl, if an object of System.Windows.Forms.Control type was created or NAVHostType_exNAVHostObject a generic object was created.
• AssemblyLocation property returns the location of the loaded file that contains the manifest/component/assembly. Sample: "C:\Windows\assembly\GAC_MSIL\System.Windows.Forms\2.0.0.0__b77a5c561934e089\System.Windows.Forms.dll"
• AssemblyName property returns the fully qualified name of the type, including its namespace but not its assembly. Sample: "System.Windows.Forms.ScrollableControl"
• AssemblyQualifiedName property gets the assembly-qualified name of the type, which includes the name of the assembly from which this type object was loaded. Sample: "System.Windows.Forms.ScrollableControl, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" 

The Host property returns the object being hosted by the NAVHost control.

If fails, the 

• IsCreated property returns NAVHostType_exNAVHostNothing, which indicates no object has been created
• AssemblyLocation, AssemblyName and  AssemblyQualifiedName return empty string
• Host property returns nothing.