.net - Inheritance of Form -

let me sketch situation. have bunch of forms inheritance implemented.

example:

 form       - form a1 (inheritance)               - form a2 (inheritance)  form b       - form b1 (inheritance)               - form b2 - formb21 (inheritance)                         - formb22 (inheritance)               - form b3 (inheritance)  interface 1  - form 1a (implementation)               - form 1b (implementation)               - form 1c (implementation) 

lets presume

the forms a1, a2,b21 & 1a contain field 'authors'

and

forms 1a,1c,b3,a2 contain field named 'origin'.

authors textbox, origin combobox.

right want group inputcontrole single superclass (where forms inherit from). how without creating form forms inherit from?

i've tried let them inherit standard class i've made error somewhere suppose:

public class superclass        inherits windows.forms.form         public sub new()            mybase.new()        end sub         public overridable  sub inputcontroleauthors()        public overridable  sub inputcontroleorigin() end class 

note: wish avoid use of shared functions well.

any pointers appreciated.

you can define interface contain controls (authors , origin in case). implement interface in desired forms accordingly.