validation - vb.net Chr KeyPress function -

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when validating textboxes in vb.net, use .chr or .chrw function define valid ranges of ascii values can entered. today came across i've not had before, had use function in e.keychar <> chr(156) format, replace value 156 value gbp sign, or £

however, after finding out online via ascii tables ascii value 156, ran code, , wouldn't let me enter £. fix this? there i'm missing?

 private sub txtfval_keypress(sender object, e keypresseventargs) handles txtfval.keypress      if e.keychar <> chr(156) andalso e.keychar <> chr(46) andalso e.keychar <> chr(44) andalso e.keychar = chrw(keys.oemcomma) _     andalso (e.keychar < chr(48) orelse e.keychar > chr(57)) andalso e.keychar <> chr(8)         e.handled = true     end if  end sub

instead of having lookup ascii number specify char suffixing string c - in vb.net indicates you've specified char literal:

if e.keychar <> "£"c andalso ...

edit:

here's more clean if-statement, see if works:

if char.isnumber(e.keychar) = false andalso e.keychar <> "£"c _     andalso e.keychar <> ","c andalso e.keychar <> "."c _      andalso e.keychar <> chr(8)     e.handled = true end if

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