Cute Editor for ASP allows you add your custom button like the followings:
editor.CustomAddons = "<span title=""Custom Addons"" class=""button"" onclick=""alert('This is a custom function');"" type=""btn"" border=""0""> Custom button </span>"
To create your custom button:
1. You need to create your own Javascript function. In the above example: alert('This is a custom function');
2. Create a string which will render the button in the browser and register this to the CuteEditor.
To create the dialog, please check the MSDN example.
Hope it helps.
Let me know if you have any further questions.
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