// at all to manipulate the controls, just simply use the XRCCTL(...) macros.
// "controls_treectrl" is the name of this control in the XRC.
// (1) Insert a column, with the column header of "Name"
// at all to manipulate the controls, just simply use the XRCCTL(...) macros.
// "controls_treectrl" is the name of this control in the XRC.
// (1) Insert a column, with the column header of "Name"