Many many years ago when REALbasic first wrote the IDE in REALbasic it was said
… Read the rest“We’re also ‘eating our own dog food,’” said Perlman. Previous releases of REALbasic were coded using the C++ language, although with REALbasic 5.5, the last significant update, the groundwork was laid to add pieces that were written in REALbasic. When REALbasic 2005 is released, the entire Integrated Development Environment (IDE) will have been recoded in REALbasic itself.