passing parameter as large integer

[sancho1980]

hi all
i used the ibx components earlier to access my firebird database from my delphi application; now i switched over to zeos and find that

dataset.parambyname('xyz').asLargeInt

or

dataset.parambyname('xyz').asint64

do not exist. how can i pass a 64-bit integer parameter? is there a way round?

thanx,

martin