The ASP.NET page framework  supports an automatic way to associate page events and methods. If the AutoEventWireup attribute of the Page directive is set to true (or if it is missing, since by default it is true), the page framework calls page events automatically, specifically the Page_Init and Page_Load methods.

    In that case, no explicit Handles clause or delegate is needed. The disadvantage of the AutoEventWireup attribute is that it requires that the page event handlers have specific, predictable names. This limits your flexibility in how you name your event handlers. Therefore, in Visual Studio, the AutoEventWireup attribute is set to false by default and the designer generates explicit code to bind page events to methods.

     If you do set AutoEventWireup to true, Visual Studio will generate code to bind the events and the page framework will automatically call events based on their names. This can result in the same event code being called twice when the page runs.

     If you set AutoEventWireup to true in your asp.net page in VS.NET, all you have to do is write a sub "Page_Load(Source As Object, E As EventArgs)" and your code is executed with each load. In the Matrix, wireup's going to happen by default.