Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_SetWindowMouseRect - Confines the cursor to the specified area of a window.
HEADER FILE
Defined in SDL3/SDL_video.h
SYNOPSIS
#include "SDL3/SDL.h" bool SDL_SetWindowMouseRect(SDL_Window *window, const SDL_Rect *rect);
DESCRIPTION
Note that this does NOT grab the cursor, it only defines the area a cursor is restricted to when the window has mouse focus.
FUNCTION PARAMETERS
window the window that will be associated with the barrier. rect a rectangle area in window-relative coordinates. If NULL the barrier for the specified window will be destroyed.
RETURN VALUE
Returns true on success or false on failure; call SDL_GetError () for more information.
THREAD SAFETY
This function should only be called on the main thread.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
•(3), SDL_GetWindowMouseRect(3), •(3), SDL_GetWindowMouseGrab(3), •(3), SDL_SetWindowMouseGrab(3) Simple Directmedia Layer SDL 3.2.8 SDL_SetWindowMouseRect(3)