How to check OpenLDAP version?

[Konstantin Chuguev <Konstantin.Chuguev@dante.org.uk>]

Hi,

Is it correct to check the OpenLDAP library version (2.0 vs. 1.2), in a
client using LDAP, like this:
#include <ldap.h>

#if LDAP_API_VERSION >= 2000
/* OpenLDAP-2.x */
#else
/* OpenLDAP-1.2.x or Umich LDAP */
#endif

?
If not, what is the correct way?

Thanks,
    Konstantin.

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