How To Validate Textbox : Only Numbers, Only Characters, Not Null, Only Email in VB.NET

How To Validate Textbox : Only Numbers, Only Characters, Not Null, Only Email in VB.NET
Today I have brought you something delicious :) so you guys wonder how it works , first we have to create a module and we just have to assign the textbox for a validation (Only Number,Only Characters,Not Null,Only Email) so first of all lets create...