CONTEXT_GET is the application defined value that is passed in as dwContext in FTPGetFile.
After the File is downloaded, the call back function should receive the INTERNET_STATUS_REQUEST_COMPLETE status with the dwContext == CONTEXT_GET.
It works perfectly on XP, 2000, NT and 95. However, on a 98 machine, I never get CONTEXT_GET. Consequently, there is no way of knowing that the file download has completed.