I was trying to restrict the data entered in a text box to only decimal point numbers and realised that .net doesn't really provide for this, or at least not in any easy way so i messed arount with a few things and eventually came up with the following code which i hope others will find useful. If anyone else has an easier way please let me know.

The first three lines are just to show some other possiblities of this kind of coding

        ' allow enter key to perform same as tab button

        If (AscW((CType(e.KeyChar, String)))) = 13 Then
            txtRate.Focus()
        End If

        'Allow Esc key to perform exit button

        If (AscW((CType(e.KeyChar, String)))) = 27 Then
            btnExit.PerformClick()
        End If

        'Allow BackSpace key to delete text

        If (AscW((CType(e.KeyChar, String)))) = 8 Then
            txtPrinciple.Text = ""
        End If





        'Allow only numbers and decimal points to be entered by user

        If Not (AscW((CType(e.KeyChar, String)))) = 46 And e.KeyChar < "0" Or e.KeyChar > "9" Then
            e.Handled = True

        End If

Hope this helps someone else from hours of frustration

If you want to do something like this (which is usually frowned on; after all this is not really a chat room) you should use a subject line that will cause this post to be found through searches...

There is no reason to parenthesize the entire test statement...     (for instance.)


This could be a lot easier to read. Every test uses the same setup...

This post is already old, but you never know, maybe other people are looking at older posts too :)

To make it even shorter:

This...
...could be