How to: Add Activities to the Toolbox
After you build a workflow solution, custom activities that you can add to the workflow project appear in the Visual Studio Extensions for Windows Workflow Foundation Toolbox. You can also add activities directly to the Toolbox from a dynamic-link library (DLL).
To add an activity to the Toolbox from a DLL
Right-click the Toolbox window surface under Windows Workflow, and then click Choose Items.
In the Choose Toolbox Items dialog box, click the Activities tab, and then click Browse.
Select the DLL that contains the activity to add to the Toolbox, and then click Open.
Click OK to finish adding the activity to the Toolbox.
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