HashMarkLocationRadioButton
button = new HashMarkLocationRadioButton("No hash marks",
button = new HashMarkLocationRadioButton("Left/top hash marks",
button = new HashMarkLocationRadioButton("Right/bottom hash marks",
button = new HashMarkLocationRadioButton("Both sides hash marks",
HashMarkLocationRadioButton* button
= dynamic_cast<HashMarkLocationRadioButton*>(parent);
HashMarkLocationRadioButton(const char* label, enum hash_mark_location
class HashMarkLocationRadioButton;