Sub ShowDialog( _
   ByVal owner As IWindow, _
   ByVal closeCallback As Action(Of DialogResult) _
) 

Dim instance As IModalWindow
Dim owner As IWindow
Dim closeCallback As Action(Of DialogResult)
 
instance.ShowDialog(owner, closeCallback)

void ShowDialog( 
   IWindow owner,
   Action<DialogResult> closeCallback
)

procedure ShowDialog( 
    owner: IWindow;
    closeCallback: Action
); 

function ShowDialog( 
   owner : IWindow,
   closeCallback : Action
);

void ShowDialog( 
   IWindow* owner,
   Action<DialogResult>* closeCallback
) 

void ShowDialog( 
   IWindow^ owner,
   Action<DialogResult>^ closeCallback
)