Hi, I'm using the same code for MySql and SqLite versions of my program and I'd like to point out that using

ro=sql[0];

can behave rather quirky.. in combination with functions like Sum() or Count()
Depending of which db you use, Count, Sum etc. could be presented as int or a String type. Confusing.

A better way (especially if you would select more than one column) is to use the As function:

UserQuerySql * SqlSelect (SqlCount(MBVARINDEX).As(MBVARINDEX)).From ( PARAMETER );
while ( UserQuerySql.Fetch() )
{
  ro=sql[MBVARINDEX];
}

I also like to use SqlSelect, SqlSum, SqlCount etc. because the other terms are so generic there are often clashes.