I am trying to create a basic textbox control similar to the Masked Edit Control that was in VB. I create a new c# windows application, add a new user control called "TestUserControl" and then I go into the code and change it to inherit from System.Windows.Forms.TextBox instead of UserControl.
It is in my toolbox automatically, but when I drop it on the form I get "The control ... could not be loaded. Ensure the library containing the control has been built and a project reference has been made to the library containing the control. If you have changed the name of the user control, close and re-open the control's designer to update the toolbox item". I have not changed the name (just the base class), I have compiled the project before trying to drop it on the form with the form designer. I have even tried going to "customize toolbox" and adding a reference to my own .EXE file and then I get an additional "TestUserControl" entry in the toolbox that when I drop on the form gives me an error of "Object reference not set to an instance of an object". What the F$#!@ am I doing wrong? This should be so simple. I have checked all over the net. The only suggestions I saw were compiling and adding a reference to your EXE. Thanks, Jeff You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
