Hi, I'm new to VS 08 and im currently designing a carbon footprint calc for a college project.
I have a textbox and I want the users to only enter numeric values and i want a messagebox to show an error saying something like "please enter a numeric value" if the user enters string. I tried converting string to Long and such methods as those but my coding goes wrong at some point.I would greatly appreciate if someone have the answer for this.
Thanks
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