preprocessor about invalid integer expression
*/
+#ifndef wxUSE_ABOUTDLG
+# ifdef wxABORT_ON_CONFIG_ERROR
+# error "wxUSE_ABOUTDLG must be defined."
+# else
+# define wxUSE_ABOUTDLG 0
+# endif
+#endif /* !defined(wxUSE_ABOUTDLG) */
+
#ifndef wxUSE_ACCEL
# ifdef wxABORT_ON_CONFIG_ERROR
# error "wxUSE_ACCEL must be defined."