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• imageMso codes for customUI images
• [MS-CUSTOMUI]: Custom UI XML Markup Specification
• Absolute Path example of onAction
  • onAction=”‘L:\Directory1\Directory2\Spreadsheet name.xlam\’!MyFavFunctionInExcelsName”
  • and then you need to add a handler called MyFavFunctionInExcelsName(control As iRibbonControl)