SDL Wiki
(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)


Allocate a set of user-defined events, and return the beginning event number for that set of events.


Uint32 SDL_RegisterEvents(int numevents);

Function Parameters

numevents the number of events to be allocated

Return Value

Returns the beginning event number, or (Uint32)-1 if there are not enough user-defined events left.


Calling this function with numevents <= 0 is an error and will return (Uint32)-1.

Note, (Uint32)-1 means the maximum unsigned 32-bit integer value (or 0xFFFFFFFF), but is clearer to write.


This function is available since SDL 2.0.0.


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