# SDL_TrayCallback A callback that is invoked when a tray entry is selected. ## Header File Defined in [](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_tray.h) ## Syntax ```c typedef void (SDLCALL *SDL_TrayCallback)(void *userdata, SDL_TrayEntry *entry); ``` ## Function Parameters | | | | ------------ | ------------------------------------------------------------------------------- | | **userdata** | an optional pointer to pass extra data to the callback when it will be invoked. | | **entry** | the tray entry that was selected. | ## Version This datatype is available since SDL 3.2.0. ## See Also - [SDL_SetTrayEntryCallback](SDL_SetTrayEntryCallback) ---- [CategoryAPI](CategoryAPI), [CategoryAPIDatatype](CategoryAPIDatatype), [CategoryTray](CategoryTray)