vb.net - How do you allow only numbers, backspace, and hyphens in a text box in Visual Studio 2010? -

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if (e.keychar < "0" orelse e.keychar > "9") andalso e.keychar <> controlchars.back andalso e.keychar = "-"     e.handled = true

i can't seem code working. trying include text box enter numbers, backspace, , hyphens working, hyphens not working, other work. help?

use maskedtextbox. it's pretty useful control. without coding allows specify characters allowed in textbox, think looking for.


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