varempty = 0
varnull = 1
varsmallint = 2
varinteger = 3
varsingle = 4
vardouble = 5
vardate = 7
varcurrency = 6
varolestr = 8
vardispatch = 9
varerror = 10
varboolean = 11
varvariant = 12
varunknown = 13
varshortint = 16
varbyte = 17
varword = 18
varlongword = 19
varint64 = 20
varstring = $100
vartypemask = $fff
vararray = $2000
varbyref = $4000
Ссылки: VarType, VarAsType, VarCast