Hi,

From your description, it seems that what you are doing is something like the translation service. And transfer the English char response from the keyboard to the Arabic languages, Right?

But based on my knowledge, ASP.NET can capture the keyboard event and you can know the key user inputs, but after you get that, you need to create the mapping relationship between your English chars and Arabic chars by yourself.

In order to get the keyboard event, you can try event.keyCode function in javascript.

Thanks.