How to implement UNDO/REDO in vb.net windows

[dilipmca04]

i am developing one eform designer project..the main object of this project is there a form in this controls are drag and drop.moving and deleting and editing the properties ..it's like a our .net designer how we drag and drop the controls ..so in my project i need to implement undo/Redo functionality..please give me the basic idea of this..(Please think like a our .net Designer (UNDO/REDO)) Thanks & regadrs Dilip

[Henry Minute]

Take a look at this blog[^], and see if it meets your needs.

Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.”

[0x3c0]

I would personally have a structure which a) describes what the user did, or b) describes the state of the control before the user interacted. Then I would use a Stack, and just push or pop the structures whenever the user clicks Redo or Undo respectively (I think)

[Dave Kreskowiak]

You may want to do some research into the "command pattern".

A guide to posting questions on CodeProject[^]
Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
     2006, 2007, 2008