I need to know how to edit/modify TreeView node and listview

[Charbz]

Hey guys i need some help i am making a program that contains 2 forms.

form1 is the man form where it got a stripmenu with 3 buttons in Add,delete, Modify and a treeview and a listview

form 2 contains a 4 textbox,1 combo box and 2 buttons ok,Cancel

what happen is wen i click Add in form 1 it takes me to form2 to fill out the details and when i click the ok button on form2 form 1 shows up with the details display in treeview and listview.

now my problem is how can i modify the node in treeview and listview?

i have uploaded my program please check it its clean you can scan it if you like. Thanks in advance for any help i get