<< Click to Display Table of Contents >> Navigation:  ThinBASIC Modules > UI (User Interface) > CONTROLS > Control Types > TreeView Control > TreeView Control Creation > CONTROL ADD TREEVIEW > Automatic Treeview Events > <TreeViewName>.OnSelChanging

 

In order to process selection change in progress, you may consider creating a callback function derived from control name.

 

  control add treeview name "myTreeview", hDlg, %controlMyTreeview, "", 5, 5, 100, 100

 

...

 

callback function myTreeview.OnSelChanging()

msgbox cbhndl, "The treeview from dialog " + myTreeview.Parent + " is about to change selection."

end function

 

Anytime selection changes, this function will be called and you can reach for standard callback parameters, such as cbhndl, from it.

 

But you will probably not even need it - due to control name global nature, you can also reference the control variable from there directly as well.