KM,

If you want to add your textbox to the toolbar, then you need to create a separate project to hold your sub-classed controls. That way you can point the toolbar to the DLL that contains these sub-classes. Then you can drag and drop the control onto your form.

The other option is to change the code-behind for your form to point to the sub-classed textbox instead of the base one. You would need to do a search and replace for any reference to the base textbox and replace it with you sub-classed reference. Make sure you save the code-behind file before switching to the design tab of your form. If not then your control may not show up properly.

>Hi Cathi,
>
>Thanks for your information. After creating this new class in code, how can I put it into the form.
>
>KM
>
>
>>Hi Km,
>>
>>You can't use the visual designer to subclass the textbox. You need to create a new class and have it inherit from the textbox class:
>>
>>

>>public class myTextBox : TextBox
>>{
>>
>>}
>>

>>
>>>How can I subclass a textbox? I created a Windows Control Library project and choose "Add Inherited Control" from the Add New Item menu. However "textbox" is not available. Could any body show me the way?
>>>
>>>TIA