{$IF LCL_FULLVERSION>=1000000} //for laz 1.0.0.0 (major,minor,release,patch)
{$IF LCL_FULLVERSION>=1000200} //for laz 1.0.2.0
or check the LazVersion unit, which contains something like
const
laz_major = 2;
laz_minor = 0;
laz_release = 1;
laz_patch = 0;
laz_fullversion = ((laz_major * 100 + laz_minor) * 100 + laz_release) * 100 + laz_patch;
laz_version = '2.0.1.0';