Function sc_screenshot_manager_capture_image_in_rect 

pub unsafe extern "C" fn sc_screenshot_manager_capture_image_in_rect(
    x: f64,
    y: f64,
    width: f64,
    height: f64,
    callback: extern "C" fn(*const c_void, *const i8, *mut c_void),
    user_data: *mut c_void,
)