Function xplm_sys::XPCreateCustomWidget

pub unsafe extern "C" fn XPCreateCustomWidget(
    inLeft: c_int, 
    inTop: c_int, 
    inRight: c_int, 
    inBottom: c_int, 
    inVisible: c_int, 
    inDescriptor: *const c_char, 
    inIsRoot: c_int, 
    inContainer: XPWidgetID, 
    inCallback: XPWidgetFunc_t
) -> XPWidgetID