// wxSP_VERTICAL: vertical spin button (the default)
// wxSP_ARROW_KEYS: arrow keys increment/decrement value
// wxSP_WRAP: value wraps at either end
// wxSP_VERTICAL: vertical spin button (the default)
// wxSP_ARROW_KEYS: arrow keys increment/decrement value
// wxSP_WRAP: value wraps at either end