Chen,

>OK, my panic is over. By right click on the TabControl, I am able to add TabPages. However, the added TabPages are strait from .NET Framework. I still need to dive into the codes to change the declarations of the added tabs to use my framework.

You're right...the VS .NET 2003 builders always add .NET Framework classes to the various collections, although this will change in Whidbey (the next version of .NET). For now, you can go to the form's code and change the control from :

System.Windows.Forms.TabPage

To:

OakLeaf.MM.Main.Windows.Forms.mmTabPage

You will need to do this in two places for each tab page...one where the tab page variable is declared, for example:

protected OakLeaf.MM.Main.Windows.Forms.mmTabPage PropertiesPage;

And one where the tab page is instantiated, for example:

this.PropertiesPage = new OakLeaf.MM.Main.Windows.Forms.mmTabPage();

The easiest way to do this, is to add all the tab pages you want, then in VS .NET, go to the menu and select Edit | Find and Replace | Replace in Files, and do the replacement using this dialog.

Regards,