I have distribuited an aplication with some tables
Now I updated my .exe and will send it to my client.

There's a problem: Some fields of client's table are
too short or do not exist.

How can I build a little code to proceed to changes as below:

Change 1
If field1 size is < than 30
Then icrease it's size to 50

Change 2
If field2 does not existe
Then create field2


Thanks

Moisés