|I discussed how to write an unsetup program
that was able to delete itself from the disk in my January 1996 Win32®
Q & A column, and I presented three techniques for making an application
delete itself. A reader recently suggested another technique that I'd like
to share with you. I have tested this technique only on Windows NT®,
but I believe that it will also work on Windows® 95. Figure 1 shows
Figure 1: DeleteMe.CPP
At this point, the cloned version of the EXE file (located in the user's temporary directory) starts running. This version examines its command-line arguments and detects that it is not the Original version but the cloned version. The cloned version extracts the process handle to the Original EXE file and waits for the Original process to terminate. Once the Original process has terminated, the cloned process can delete the EXE file image. This, of course, gives you the desired effect of deleting the EXE file that was running. But what about deleting the cloned EXE file that was copied to the user's temporary directory? Because the cloned EXE file was opened by the Original EXE with the FILE_FLAG_DELETE_ON_CLOSE flag, the Operating system will delete the cloned EXE file automatically when it terminates. Nothing could be easier.