Folks, Never mind. I went through and changed the permissions on the f: drive and now it is working again. Even though my userId in cygwin is administrator Windows does not seem to recognise me as such. CreateFile() is now able to create a valid handle once more. I also dont seem to have any side effects of changing the mode on the file.
Kirk Kirk Russell IT BJU 864 242 5100 x3884 >>> "Kirk Russell" <[EMAIL PROTECTED]> 2/20/2007 1:18:03 PM >>> Hi, I am trying to port a program from Windows XP to Vista and am running into several issues. 1) When I issue an fopen of a file with "rb" or "wb" modes they fails. I have since switched to just a "r" and "w" and it now works. This was not an issue on XP. 2) When I issue a CreateFile() function call against f: which is a USB drive an invalid handle error is returned. I would appreciate any help solving this. Some of the things that I have done are. a) Ran as the admin user b) created a manifest file to run the process as admin c) Ran CreateFile() on a directory (f://test) and not the root for the USB drive (f:) d) Turned off UAC Kirk Kirk Russell IT BJU 864 242 5100 x3884 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/ -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/