A variable controlling whether the window frame and title bar are interactive when the cursor is hidden
Defined in SDL_hints.h
#define SDL_HINT_WINDOW_FRAME_USABLE_WHILE_CURSOR_HIDDEN "SDL_WINDOW_FRAME_USABLE_WHILE_CURSOR_HIDDEN"
This variable can be set to the following values:
By default SDL will allow interaction with the window frame when the cursor is hidden