jeremias_t,
>>Your example is using aspx file to add custom button (using in line code)
The cod also works for VB file.
Please open CEHtmlEditorProvider.vb and add the following code to the end of Sub Initialize():
'about Italic, see Full.config
'<item type="image" name="Italic" imagename="Italic" />
'get the pos after the Italic
Dim pos As Integer
pos = Editor1.ToolControls.IndexOf("Italic") + 1
'Themes/%ThemeName%/Images/text.gif
Dim ctrl As System.Web.UI.WebControls.WebControl
ctrl = Editor1.CreateCommandButton("MyButton", "text.gif", "Insert My Custom Text")
ctrl.Attributes("onclick") = "ShowMyDialog(this)"
'add this custom button into the editor
Editor1.InsertToolControl(pos, "MyButton", ctrl)
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