If you are using the main C++ distribution of wxWidgets, Feel free to ask any question related to wxWidgets development here. This means questions regarding to C++ and wxWidgets, not compile problems.
3 posts • Page 1 of 1
It should be simple to implement if needed, seeing that wxCheckBox already supports the 3rd state. You can make your own using that wxControl and wxControlWithItems; see the wxListBox and wxCheckListBox as examples on how to do it.