Yes, please check the following example:
 | How to create a custom button(client side) which displays a dialog?( C# | VB )
This example demonstrates how easy it can be to add your own client side buttons to the CuteEditor by creating a Cross Browser Modal Dialog Box. |
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Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
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