一个带有checkbox的tree control!\"Checkboxes in a tree control\" shows how to add normal and three-state checkboxes to a tree control, and how to get notified when the checkbox changes. The sample project uses MFC, but the technique can easily be adapted to a Win32 or an ATL/WTL application.-a checkbox with the tree control! "Checkboxes in a tree control "shows how to add normal and thr ee-state checkboxes to a tree control, and how to get notified when the checkbox change s. The sample project uses MFC. but the technique can easily be adapted to a win3 multigene 2 or an ATL / WTL application.