Introduction - If you have any usage issues, please Google them yourself
Sometimes we often need to implement tree polymorphic choose, this article presents a concrete realization of three-state selection tree. Step one: generate a dialog box works. Step two: Add the tree control, set the desired properties. Step three: do the three-state selection box icon, and in the OnInitDialog () to initialize the tree, the tree control with a selection box icon image list control contact concrete realization to see the source code. Step four: left-click the message, the tri-state choice to achieve tree.