This is as far as I got and now I'm stuck:

lcString1='\\SMT002'
lcString2='HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\EventLog\Application\WinApp'

DECLARE INTEGER RegisterEventSource IN WIN32API STRING lcString1,STRING lcString2

MyHandle=RegisterEventSource(lcString1,lcString2)

&& The ReportEvent() should be here

DECLARE INTEGER DeregisterEventSource IN WIN32API INTEGER lnHandle
=DeregisterEventSource(MyHandle)

I seem to get a valid handle, because some huge number is returned, and I get a returncode of 1 when I call DeregisterEventSource, so I assume that works as well.

The MSDN Library describes how to call ReportEvent in Win32API as follows-

BOOL ReportEvent(
  HANDLE hEventLog,    // handle to event log
  WORD wType,          // event type
  WORD wCategory,      // event category
  DWORD dwEventID,     // event identifier
  PSID lpUserSid,      // user security identifier
  WORD wNumStrings,    // number of strings to merge
  DWORD dwDataSize,    // size of binary data
  LPCTSTR *lpStrings,  // array of strings to merge
  LPVOID lpRawData     // binary data buffer
);
Parameters
hEventLog 
[in] Handle to the event log. This handle is returned by the RegisterEventSource function. 
wType 
[in] Specifies the type of event being logged. This parameter can be one of the following values. Value Meaning 
EVENTLOG_SUCCESS Success event 
EVENTLOG_ERROR_TYPE Error event 
EVENTLOG_WARNING_TYPE Warning event 
EVENTLOG_INFORMATION_TYPE Information event 
EVENTLOG_AUDIT_SUCCESS Success audit event 
EVENTLOG_AUDIT_FAILURE Failure audit event

Now as far as C/C++ is concerned, I don't know my backside from my elbow, and
my questions here really are:

How do I translate this stuff into a VFP DECLARE-DLL statement?

Which parameter types should I use as seen from VFP?

Which values shoul I pass?

TIA, your help is greatly appreciated.