AD
Administrator
Syncfusion Team
December 12, 2003 10:30 PM UTC
Make sure you build your project before you try to open a form with a derived control.
If you run into the problem, just close the form and rebuild All, and then try to open the form in the designer.
Another option is to create a Class Library project for your derived control. Then build it, and then add the derived control to your toolbox by browsing to the class library assembly.