pub fn invalidate(&self) {
        use winapi::um::winuser::InvalidateRect;

        let handle = check_hwnd(&self.handle, NOT_BOUND, BAD_HANDLE);
        unsafe { InvalidateRect(handle, ptr::null(), 1); }
    }
/// Invalidate the whole drawing region.
Invalidate the whole drawing region.
Invalidate the whole drawing region .
pub fn invalidate(&self) {
        use winapi::um::winuser::InvalidateRect;
        let handle = check_hwnd(&self.handle, NOT_BOUND, BAD_HANDLE);
        unsafe { InvalidateRect(handle, ptr::null(), 1); }
    }
pub fn invalidate ( & self ) { use winapi :: um :: winuser :: InvalidateRect ; let handle = check_hwnd ( & self . handle , NOT_BOUND , BAD_HANDLE ) ; unsafe { InvalidateRect ( handle , ptr :: null ( ) , 1 ) ; } }
Invalidate the whole drawing region.
Invalidate the whole drawing region .
&self