Hmmm, I think I'll pass helping him out. "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon "Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

If there is any automatic save option, I don't know of it. Even if there was one provided by MS, it would generically store too much data and make the file size too large. For example, you don't want to be storing every attribute of the listView object: Font, BackColor, ForeColor, Items etc. Here's a generic example to illustrate the preference class: //Save the form's background color preferences.Add("windowsBColor", this.BackColor); -------- //Restore the windows backcolor if (preferences.ContainsKey("windowBColor")) { this.BackColor = (Color)(preferences["windowBColor"]); } If you need further assistance, don't hesitate to ask. Cheers! Richard My code this week has no errors. But it's Monday morning and I haven't got out of bed.

Speeding up the loading process depends also on the way you store data in files. Is it possible to make any precalculations for that data, so that it is not necessary to calculate some things while loading? How do you know where the items from a file should be placed in the treelistview? Try to sort data in your files, so that you know it without any parsing, calculating and so on. E.g. store a value that would indicate how many items there are to load for each branch of the tree. Secondly, you can use e.g. BackgroundWorker class provided with .NET, which will run the loading process on another thread and let you do something else, while loading lasts.

Mike, Thanks for your guidence, I will check it out, mean while what i did was I have added a Item when the value is changed in the Numericupdowncell and removed when combobox is selected. Now it is working fine. SomaShekhar