As usual everything is described in FoxPro manual :)

Function SQLGetProp() called with cSetting='ODBChstmt' returnes the internal ODBC statement handle, which may be used by external library files (FLL files) to call ODBC.

hStat = SQLConnect('MySource')
hRealStat = SQLGetProp(hStat, "ODBChstmt")
? 'Real statement handle:', hRealStat
= SQLDisconnect('MySource')

That means the handle returned by SQLConnect() -- even if it is desribed in the manual as a statement handle -- is just an internal FoxPro handle.

The SQLRowCount called with a real statement handle does not create an exception error.