Borland made a bad business decision by trusting Microsoft to "play fair". For their flagship C++ IDE, they instrumented a version of the Windows headers to ge

Borland made a bad business decision by trusting Microsoft to "play fair". For their flagship C++ IDE, they instrumented a version of the Windows headers to generate classes for their OO GUI framework. Microsoft then started to frequently change the Windows headers in ways that broken Borlands product. With no advance notice, every month or two MS would release an updated Windows SDK that broke Borlands tools.