Services under Win NT

The Win32 help file in Delphi 2 has a bunch of functions for managing services under Windows NT, such as OpenService, OpenSCManager, QueryServiceStatus, StartService, CloseServiceHandle and many more, but when I try to use them I get "Undeclared identifier: OpenService". What am I missing?
freyrbAsked:
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erajojConnect With a Mentor Commented:
D2 has no support these functions since there are no interfaces
for then in the RTL's. However; you can always use standard
DLL calls to reach the functions. The problem is to find them.
I searched and found the functions in these DLL's:

  advapi32.dll, dhcpcsvc.dll, drivers .dll, netapi32.dll,
  netui1  .dll, ole32   .dll, rpcns4  .dll, rpcrt4  .dll,
  security.dll

You've better try'em and find out for your self which one
it is. Maybe someone can give us a clue?

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freyrbAuthor Commented:
The main DLL is advapi32.dll, but has two sets of all function where you can select between UNICODE and ANSI. These functions' names are appended with A for ANSI and W for UNICODE, e.g. StartServiceA and StartServiceW. So a typical declaration would be:
function StartService; external 'ADVAPI32.DLL' name 'StartServiceA';
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