onkeypress in .net ?

Hey avery body,

I have a pice of code

txtSoeg.Attributes.Add("onkeypress", string.Format("if(event.keyCode==13) return {0}", searchFunc));

Is onkeypress keyword here javascript or .net?

I dont know why i think this pice off code can bee more ..simple..more .net !??!

 string.format here is making af choise..if ...    - Somboby told med String.Format wass only for formatiing tex,date and so on

 
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