MFC Tree Control: How to add checkboxes to a tree control?

Q: How to add checkboxes to a tree control?

A:

• At design time, use the resource editor to enable the "Check boxes" style.
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• At run-time, add the 'TVS_CHECKBOXES' style to the tree control, after you have created it and before you have populated it.
  
  
  Code:

  ---

  DWORD dwLong = m_tree.GetWindowLong(GWL_EXSTYLE);
dwLong |= TVS_CHECKBOXES;
m_tree.SetWindowLong(GWL_EXSTYLE, dwLong);

  ---

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