Percent Type for Extension fields

[Former Member]

Hi,

I would like to create an extension field that has the same look and behavior as the field

Chance of Success (ProbabilityPercent) in the opportunity screen.

Does anyone know how to proceed? Because the only thing I have been able to do is to create a LANGUAGEINDEPENDENT_EXTENDED_Text field and programmatically add the percent if he doesn't exist. But still the look of this field is different of the field "chance of success", it's longer and the text is left align and I can't modify it has I've added it to the screen via the extensibility explorer.

Thank you for your help.

Lee-Roy