How to Convert Every First letter of a Field into Uppercase by Default

If a Name is entered  into Name Field in Customer Card like for example "prateek gupta" it should automatically convert into "Prateek Gupta"

Global Variables :

Name              Data Type          Length

Indx                 Integer                            

NewValue         Text                     20

Cap                  Boolean

##Code on Trigger : OnValidate (on a Table Field that you wish to apply this code on)