Hi,
Currently there is no direct way to do this. The closest you can get is this:
Code: HTML/ASPX
<eo:MaskedEdit runat="server" ID="me2">
<eo:MaskedEditSegment Mask="-9999.99" SegmentType="Mask" />
</eo:MaskedEdit>
This will allow you to do
almost what you wanted to do with one problem: If you type "123", the number "23" will become the decimal (as expected), however if you type "123", then the number "1" will take the "."'s place and you will see ".23" on the screen. If you continue to type, it will work as expected. We will see if we can fix this problem in our next build.
Thanks!