How do I run my java file through Visual C++ Debugger.

you have to use java.exe as the debugging application for your DLL. You open your native DLL project and enter the following in the Debug tab of the project:

  <your javahome>/bin/java.exe -Djava.library.path=<your DLL path> -classpath <your cp> <other options> <your Java class>

This has worked reliably for us here at Codemesh when we debugged our JNI tool.

Answer by Alexander Krapf