Monitoring ISAPI works for:
•Native ISAPI extensions.
Native ISAPI
If you are working with native ISAPI you must use the NT Service API in your service as well as using the Monitor ISAPI method below.
To start monitoring ISAPI:
 Launch menu 
 IIS menu  
 Monitor IIS and ISAPI... 
 shows the Monitor ISAPI dialog below 
or use the shortcut
 
  Monitor IIS and ISAPI
Set the dll to monitor, the web root, the IIS process, an optional web browser to use and an optional url to launch, and click OK.

•ISAPI DLL 
 type or Browse to set the ISAPI DLL that we're monitoring 
 
•IIS web 
 type or Browse to set the web root for the IIS website we're working with
 
•IIS process to monitor 
 select the IIS process we're working with
 
•Web Browser 
 select the web browser that you're going to use to load the web page
 
•URL to open in browser 
 type the web page and arguments you want to load to cause the ISAPI to be loaded in IIS
•OK 
resets IIS, setups all the variables, copies DLLs and settings into the web root and starts the web browser to load the specified web page 
 IIS is a protected process and can only execute, read and write files in specific directories. That's why Bug Validator copies data to the web root so that it can be read, written or executed.