Comments by chiselca (Top 4 by date)

It's been 2 years but I remember that my main problem was I had MessageBox calls that were executing and stopping the thread before the code that sets up the file mapping even ran. You can't use MessageBox calls in the process that is running in Session 0 because the user will not see them and therefore cannot dismiss them, so they pause the thread forever. Other than that I followed the advice on this forum thread and got it working. Here is some of my code, hope it helps:

// Attempt to create a named file mapping object.
hMapObject = CreateFileMapping(
(HANDLE) 0xFFFFFFFF, // use paging file
&sa, // specific security attributes
PAGE_READWRITE, // read/write access
0, // size: high 32-bits
sizeof(TsharedMem), // size: low 32-bits
"Global\\MyFileMap"); // name of map object

sa is defined as --

TCHAR * szSD = TEXT("D:") // Discretionary ACL
TEXT("(D;OICI;GA;;;BG)") // Deny access to built-in guests
TEXT("(A;OICI;GA;;;BA)") // Allow SDDL_GENERIC_ALL (GA) to administrators (BA)
TEXT("(A;OICI;FA;;;BU)"); // Allow FILE_ALL_ACCESS (FA) to built-in Users (BU)


ConvertStringSecurityDescriptorToSecurityDescriptor(
szSD,
SDDL_REVISION_1,
&(sa->lpSecurityDescriptor),
NULL);

On the 64 bit machine I am watching my service's registry keys under the "WOW6432Node". They don't update until the service is stopped. Likewise, on the 32 bit VM I monitor my keys under "HKLM\Software" and they also do not update until the service is stopped. Where else could the service possibly be writing to? On Windows XP the registry keys are updated immediately while the service is running. Also, with regards to 'Reflection', from what I have read Reflection is disabled in Windows 7.

Dave, Yes, it IS a 32 bit app, but see my further explanations below regarding 32 bit and 64 bit Windows. And yes, I am aware, but only recently, about the Wow6432Node registry key. On my x64 machine that node is not getting updated until the service is stopped.