QuickOPC toolkit items do not appear in the Toolbox

There should be tab labeled QuickOPC in the Visual Studio Toolbox, and contain the toolbox items described in this document. The actual items displayed depend on the type of project and designer. In some cases, you may not have the QuickOPC tab or any QuickOPC items in the Toolbox, or if the set of items is incomplete.

1. Check that you are designing a supported project and item - such as Windows Forms form or control, or a WPF window. Make sure you have a document open in the editor that allows placing components to it – such as a Windows form (alternatively, “Show All” can be selected in the Toolbox).
2. Verify that your project (in its Properties) is targeting a supported version of .NET Framework. If not, retarget the project to a supported version. Commonly, if you do not see the right components, it means that your project is not targeting the .NET Framework version 4.7 or later.
3. Perform a “Reset Toolbox” command (right-click in the toolbox area first), and restart Visual Studio.
4. If everything else fails, you can add the QuickOPC components to the Toolbox manually (you only need to this once): Right-click in the Toolbox area, and select “Choose Items…”.

   

          
   In the “Choose Toolbox Items” dialog, select “.NET Framework Components” tab (for Windows Forms or similar projects), or the "WPF Components" tab (for WPF), and type opclabs into the Filter field.

   Then, check all boxes next to the displayed components, and press OK. The component icons should appear in the Toolbox. Note: they will only be visible in the proper context, i.e. when you have selected an appropriate parent component (usually, a Windows Form) in the designer, or when you check “Show All” in the Toolbox context menu.

You can create a new toolbox tab named “QuickOPC”, and move the component icons into this tab. To create a new tab, right-click in the Toolbox area, and select "Add Tab".