SDL_SetCursor (3) - Linux Manuals
SDL_SetCursor: Set the currently active mouse cursor.
NAME
SDL_SetCursor - Set the currently active mouse cursor.SYNOPSIS
#include "SDL.h"
void SDL_SetCursor(SDL_Cursor *cursor);
DESCRIPTION
Sets the currently active cursor to the specified one. If the cursor is currently visible, the change will be immediately represented on the display.
SEE ALSO
SDL_GetCursor, SDL_CreateCursor, SDL_ShowCursor