I have seen a number of requests for using the legacy icons in your applications for the 64 bit versions of MapInfo Pro.
With the latest patch for v16.0, this is now possible.
From the Release Notes:
Support for Legacy Win32 icons in Ribbon controls
You can now use the legacy icons from Win32 versions of MapInfo Professional. Icon resources can be identified using the define or number from Icons.def. A MapBasic example here is setting the icon for a RibonButtonControl to use the legacy Printer icon from Win32:
Call SetRbnBtnCtrlLargeIcon(button2, New_Uri("pack://legacyorigin:,,,/"& MI_ICON_PRINT & ";Large", 0))
Note: You cannot put Win32 legacy icons within a Gallery control in MapInfo Pro 16.0.3.
Get the patch here:
http://www.pbinsight.com/support/product-downloads/item/mapInfo-pro-v16.0.3-maintenance-release