Microsoft had RNI which was comparable to JNI and could be used to write native code. It also had J/Direct which could be used to bind existing native code to a

Microsoft had RNI which was comparable to JNI and could be used to write native code. It also had J/Direct which could be used to bind existing native code to a Java method declared native with only a comment, the closest to that for standard Java that I know of is JNA and apparently that wasn't around until 2007?