X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8ba7c77150d74a5385f2385e5448ca491263179f..b9efe021b554fa3967d1442cf758435c5cd5ae8f:/include/wx/ctrlsub.h

diff --git a/include/wx/ctrlsub.h b/include/wx/ctrlsub.h
index 1736c324e6..d747a60d2b 100644
--- a/include/wx/ctrlsub.h
+++ b/include/wx/ctrlsub.h
@@ -16,6 +16,8 @@
     #pragma interface "controlwithitems.h"
 #endif
 
+#include "wx/defs.h"
+
 #if wxUSE_CONTROLS
 
 #include "wx/control.h"      // base class
@@ -65,6 +67,11 @@ public:
     // reads better for multi-selection ones
     void Select(int n) { SetSelection(n); }
 
+
+protected:
+
+    // check that the index is valid
+    inline bool IsValid(int n) const { return n >= 0 && n < GetCount(); }
 };
 
 class WXDLLEXPORT wxItemContainer : public wxItemContainerImmutable