File list (Check if you may need any files):
ComboBoxTree\ComboBoxTree.sln
............\ComboBoxTree.suo
............\Demo\ArrayToDataTable.cs
............\....\bin\Release\Demo.exe
............\....\...\.......\DropDownPanel.dll
............\....\...\Release
............\....\bin
............\....\Demo.csproj
............\....\Form1.cs
............\....\Form1.designer.cs
............\....\Form1.resx
............\....\Program.cs
............\....\...perties\AssemblyInfo.cs
............\....\..........\Resources.Designer.cs
............\....\..........\Resources.resx
............\....\..........\Settings.Designer.cs
............\....\..........\Settings.settings
............\....\Properties
............\Demo
............\.ropDownPanel\bin\Release\DropDownPanel.dll
............\.............\...\Release
............\.............\bin
............\.............\ComBoxTree\ComboBoxTree.cs
............\.............\..........\DropDownNode.cs
............\.............\..........\DropDownTree.cs
............\.............\ComBoxTree
............\.............\..ntrols\DropDownPanel.cs
............\.............\........\DropDownPanel.Designer.cs
............\.............\Controls
............\.............\DropDownPanel.csproj
............\.............\Events\Events.cs
............\.............\Events
............\.............\Forms\DropDownForm.cs
............\.............\.....\DropDownForm.designer.cs
............\.............\.....\DropDownForm.resx
............\.............\Forms
............\.............\Helper\DropDownMessageFilter.cs
............\.............\......\DropDownWindowHelper.cs
............\.............\Helper
............\.............\Interfaces\IDropDownAware.cs
............\.............\..........\ILookupItem.cs
............\.............\Interfaces
............\.............\Properties\AssemblyInfo.cs
............\.............\Properties
............\.............\Unmanaged\UIApiCalls.cs
............\.............\Unmanaged
............\DropDownPanel
ComboBoxTree