Using boost shared memory.  One process creates shared memory ( as an administrator on windows).

shared_memory_object(open_or_create, pShareName, read_write);

Another process ( not administrator) tries to open and map to shared memory. 

shared_memory_object(open_only, pShareName, read_write); <-this fails with access denied

Check permissions in on file and users only have a read permission.  Once those are changes ( after created by the process running as administrator) the file can then be opened and shared by the other process.  Is this how shared memory works.  I check the code and createfile has a file_share_read|write|delete option and is set to Generic_read|write. 

I have not been able to find any literature on a solution, but have seen the problem on the net.

Thanks