试一下下面的函数，我用过，没有问题。
Procedure CopyTable(Table:TTable;sFileName:String;Overwrite:LongBool);
var Props: CURProps;
begin
Check(DbiGetCursorProps(Table.Handle, Props));
Check(DbiCopyTable(Table.DBHandle,Overwrite, PChar(Table.TableName),
Props.szTableType, PChar(sFileName)));
end;
