How to disable copy paste and cut on textbox in asp.net?

1. Simple prevent copy paste or cut on a textbox
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2. Prevent right click on the textbox
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javascript:
function preventRightClick(event)
{
if (event.button==2)
{
alert("Right Clicking disabled!");
}
}


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3. Prevent ctrl key
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javascript:
function PreventCtrlKey(e)
{
var code = (document.all) ? event.keyCode:e.which;
if (parseInt(code)==17)
{
alert('Ctrl key disabled');
window.event.returnValue = false;
}
}