-#define CHECK_ITEM( item ) if ( !item.IsOk() ) { \
- wxMessageBox("Please select some item first!", \
- "Tree sample error", \
- wxOK | wxICON_EXCLAMATION, \
- this); \
- return; \
+#define CHECK_ITEM( item ) if ( !item.IsOk() ) { \
+ wxMessageBox(wxT("Please select some item first!"), \
+ wxT("Tree sample error"), \
+ wxOK | wxICON_EXCLAMATION, \
+ this); \
+ return; \