activedesignereventhandlerexample.cpp

#using <system.dll>

usingnamespaceSystem;
usingnamespaceSystem::ComponentModel;
usingnamespaceSystem::ComponentModel::Design;

namespaceMiscCompModSamples
{
 public ref classActiveDesignerEventHandlerExample
 {
private:
ActiveDesignerEventHandlerExample()
 {
 }

//<Snippet1>
public:
voidLinkActiveDesignerEvent( IDesignerEventService^ eventService )
 {
// Registers an event handler for the ActiveDesignerChanged event.
 eventService->ActiveDesignerChanged += gcnew ActiveDesignerEventHandler( this, &MiscCompModSamples::ActiveDesignerEventHandlerExample::OnActiveDesignerEvent );
 }

private:
voidOnActiveDesignerEvent( Object^ /*sender*/, ActiveDesignerEventArgs^ e )
 {
// Displays changed designer information on the console.
if ( e->NewDesigner->RootComponent->Site != nullptr )
 {
Console::WriteLine( "Name of the component of the new active designer: {0}", e->NewDesigner->RootComponent->Site->Name );
 }
Console::WriteLine( "Type of the component of the new active designer: {0}", e->NewDesigner->RootComponentClassName );
if ( e->OldDesigner->RootComponent->Site != nullptr )
 {
Console::WriteLine( "Name of the component of the previously active designer: {0}", e->OldDesigner->RootComponent->Site->Name );
 }
Console::WriteLine( "Type of the component of the previously active designer: {0}", e->OldDesigner->RootComponentClassName );
 }
//</Snippet1>
 };
}