I have been successfully using a .NET COM object in a application created with Delphi 7.
However, when I try to same routines in a service, it does not work. The code I am using
is:
..........
var
PrintToPACS: oleVariant;
..........
try
CoInitialize(nil);
PrintToPacs:=CreateOLEObject('Sonultra.PrintToPacs'); //from registered dll: PrintToPacs.dll
except on E: Exception do begin
writeln(Logfile,'Error creating PTP client, '+E.Message);
flush(logfile);
end;
end;

This works fine in an application, which will run in any directory on the Win7 target machine.
However, when attempting the same code in a service, I always get the error message
"Error creating PTP client, OLE error 80131534"
This is true with the firewall off, antivirus off, and with the PrintToPacs.dll available in
the start directory, \windows\system32, windows\syswow64, and with changing
directory to any other directory where the dll exists before calling CreateOLEObject.

Any help on this will be greatly appreciated. Thanks much!