Excel VBA connect to remote Oracle DB with InstantClient

Ended up editing/using this function (which does not(?) use driver/provider: InstantClient but still uses the files):

Function ORAQUERY(strHost As String, strDatabase As String, strSQL As String, strUser As String, strPassword As String)  Dim strConOracle, oConOracle, oRsOracle  Dim StrResult As String  StrResult = ""  strConOracle = "Driver={Microsoft ODBC for Oracle}; " & _         "CONNECTSTRING=(DESCRIPTION=" & _         "(ADDRESS=(PROTOCOL=TCP)" & _         "(HOST=" & strHost & ")(PORT=1521))" & _         "(CONNECT_DATA=(SERVICE_NAME=" & strDatabase & "))); uid=" & strUser & " ;pwd=" & strPassword & ";"  Set oConOracle = CreateObject("ADODB.Connection")  Set oRsOracle = CreateObject("ADODB.Recordset")  oConOracle.Open strConOracle  Set oRsOracle = oConOracle.Execute(strSQL)  MsgBox (oRsOracle.Fields(0).Value)  varResult = oRsOracle.GetRows  Do While Not oRsOracle.EOF      If StrResult <> "" Then        StrResult = StrResult & Chr(10) & oRsOracle.Fields(0).Value      Else        StrResult = oRsOracle.Fields(0).Value      End If    oRsOracle.MoveNext  Loop  oConOracle.Close  Set oRsOracle = Nothing  Set oConOracle = Nothing  ORAQUERY = StrResultEnd Function

Correct full Connection String:

Driver={Microsoft ODBC for Oracle}; CONNECTSTRING=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=strHost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=strDatabase))); uid=strUser; pwd=strPassword;

Provider or Driver:
{Microsoft ODBC for Oracle}

Needed to set PATH environmental variable to point to instantclient.
Didn't use any of the other environmental variables e.g. ORACLE_HOME, TNS_ADMIN, etc.