The following constants are defined in wxWidgets:

wxMAJOR_VERSION	The major version of wxWidgets
wxMINOR_VERSION	The minor version of wxWidgets
wxRELEASE_NUMBER	The release number
wxSUBRELEASE_NUMBER	The subrelease number which is 0 for all official releases

For example, the values or these constants for wxWidgets 2.8.7 are 2, 8, 7 and 0.

Additionally, wxVERSION_STRING is a user-readable string containing the full wxWidgets version and wxVERSION_NUMBER is a combination of the three version numbers above: for 2.1.15, it is 2115 and it is 2200 for wxWidgets 2.2.

The subrelease number is only used for the sources in between official releases and so normally is not useful.

Include file:

#include <wx/version.h>