Initial upload. Not currently functional as a mod. Includes some slightly refactored source code as well as the original mission this was debuted in zipped up as reference + example of usage.

functions/build/fn_factoryConfirmSelection.sqf

@@ -0,0 +1,52 @@
+/*
+	Author: Clarky
+	Usage: 	
+		[_class, _cost, _buildTime, _specialisation] call CLF_fnc_factoryConfirmSelection;
+
+		Intended to be called locally using the CONFIRM button in the VehicleFactory dialog
+	
+	Purpose:
+		Confirms whether or not the build of a vehicle can commence
+*/
+
+//params ["_class", "_cost", "_buildTime", "_specialisation", "_specialisationData"];
+
+// Fetch the display and listbox to find the selected row so we can reference its data
+private _display = findDisplay 9999;
+private _listBox = _display displayCtrl 1500;
+private _row = lnbCurSelRow _listBox;
+
+if (_row < 0) exitWith {hint "No vehicle was selected.";};
+if (isNull player) exitWith {hint "ERR: No player found"};
+
+if !(([player] call ace_common_fnc_isEngineer) || (missionNamespace getVariable "allCanUseLogistics")) exitWith { 
+    [
+        "CLF_ShowMessage",
+        [
+            1,
+            1,
+            "No engineer privileges found."
+        ],
+        player
+    ] call CBA_fnc_targetEvent; 
+};
+
+// Fetch vehicle data from the selected row and compile it so we can access it and pass it through to the build function
+private _vehicleData = 
+	call compile (_listBox lnbData [_row,0]);
+
+_vehicleData params [
+		"_class",
+		"_cost",
+		"_buildTime",
+		"_specialisation",
+		"_specialisationData"
+	];
+
+[player, _class, _cost, _buildTime, _specialisation, _specialisationData] spawn CLF_fnc_factoryBuild;
+
+//hint str (_listBox lnbData [_row,0]);
+
+//private _camera = "camera" camCreate getPosATL player;
+//_camera cameraEffect ["internal", "back"];
+//showCinemaBorder false;