Is it possible using some sort of client side code to detect cut and paste?
The only solution I can think of is to constantly get the text length and if it changes drastically over a certain period, then assume text was pasted.
It seems like the only way you'd know if the text changed through all the crazy ways text can be inserted into a textbox might be to monitor the value in an Interval...checking for when the next interval value was different from the previous...that would detect any form of change but it isn't a very neat solution (seems overkill)...