I just wondered what that dll you are looking for did that cannot already be done. $com with ADODB can use MySQL already, like this (you just need to replace the [color:400080]purple[/color] bits with your specific info):
var %ConnectionString = "Provider=MySQLProv;Data Source=[color:400080]mySQLDB[/color];User Id=[color:400080]myUsername[/color];Password=[color:400080]myPassword[/color]"
comopen objConnection ADODB.Connection
!.echo -q $com(objConnection, Open, 1, *bstr, %ConnectionString)
var %SQL = SELECT [color:400080]Field1[/color], [color:400080]Field2[/color], [color:400080]Field3[/color] FROM [color:400080]MyTable[/color]
comopen objRecordset ADODB.Recordset
!.echo -q $com(objRecordset, CursorLocation, 4, i4, 3)
!.echo -q $com(objRecordset, Open, 1, *bstr, %SQL, dispatch, objConnection)