Public Overloads Sub GetWorkbookAsync( _
   ByVal sessionId As String, _
   ByVal workbookType As WorkbookType, _
   ByVal userState As Object _
) 

Dim instance As ExcelService
Dim sessionId As String
Dim workbookType As WorkbookType
Dim userState As Object
 
instance.GetWorkbookAsync(sessionId, workbookType, userState)

public void GetWorkbookAsync( 
   string sessionId,
   WorkbookType workbookType,
   object userState
)