CVI isn't like Visual Basic: UIR files do not contain any line of code; these files only contain the description of panels and controls that constitue the user interface, therefore you cannot revert them to the corresponding code. Applications generated with CVI are compiled executable: the source code is not present in the .EXE.
As far as I can remember, you can do some cosmetic changes to the UIR provided that you do not add or delete any control, do not alter the tab order of controls in any panel and do not modify any "structural" element in the controls (e.g. the label/value list of rings). But no more than this if you don't have the source.
Last but not least, CVI isn't a C++ compiler: it's a ANSI C development environment, instead.
