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VB.NET/C# and JavaScript communication

Introduction
This article is about passing data between VB.NET/C# WinForms and JavaScript.
Before reading further, let me warn you that this article is not about ASP.NET. Concepts covered in the article are applied to Desktop applications.
Background
I was working on a project which required dat ......

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AS("#...").keypress(function(event) {
        if (navigator.userAgent.toLowerCase().indexOf("mozilla") >= 0) {
         var $key = event.charCode ;
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         var $key = event. ......
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