is it possible to create a custom icon and display it in SAP GUI classic dynpro? I would need to display it in the toolbar of my application - if possible.
If you are asking about making your OWN icon, not using one of SAP's, then I don't think that is possible, because icons are a part of your SAPGui installation. Even if you uploaded an icon successfully (SE78 or RSTXLDMC), it would only work for you, and only work until you update or reinstall your SAPGui. Hence you wouldn't be able to create a custom icon for all users.