The system window manager event contains a pointer to system-specific information about unknown window manager events. If you enable this event using SDL_EventState(), it will be generated whenever unhandled events are received from the window manager. This can be used, for example, to implement cut-and-paste in your application.
typedef struct {
Uint8 type; /* Always SDL_SYSWMEVENT */
SDL_SysWMmsg *msg;
} SDL_SysWMEvent;
If you want to obtain system-specific information about the window manager,
you can fill the version member of a SDL_SysWMinfo
structure (details can be found in SDL_syswm.h, which must be included) using the SDL_VERSION() macro found in
SDL_version.h, and pass it to the
function: