1.
```
_disp = findDisplay 46 createDisplay "RscDisplayEmpty";
_tree = _disp ctrlCreate ["RscTree", -1];
_tree ctrlSetPosition [safeZoneX + 0.25 * safeZoneW, safeZoneY + 0.25 * safeZoneH, 0.5* safeZoneW, 0.5*safeZoneH];
_tree ctrlCommit 0;
_tree tvAdd [[], "Item 1"];
_tree tvAdd [[], "Item 2"];
_tree ctrlAddEventHandler ["TreeExpanded", {hint str _this}];
```
2. double click the item