Please check the source code of the following example (included in the download package):
System.Web.UI.WebControls.Image Image1 = new System.Web.UI.WebControls.Image ();
Image1.ToolTip = "Insert today's date";
Image1.ImageUrl = "tools.gif";
// set Image size here......
Image1.Width=........;
Image1.Height=........;
Image1.CssClass = "CuteEditorButton";
SetMouseEvents(Image1);
Image1.Attributes["onclick"]="var d = new Date(); CuteEditor_GetEditor(this).ExecCommand('PasteHTML',false,d.toLocaleDateString())";
tc.Control.Controls.Add(Image1);
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asp wysiwyg html editor: http://cutesoft.net/ASP
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