Handling Dynamic Objects. Need Advice Please...

Hello Silk Nation,

I have an application that is throwing dynamic objects at me.  Either a 3 digit or 4 digit number as part of the name.  Using a ? helps me handle the number change, but not the 3 to 4 digit change.  I have defined 2 objects:

c13_securitiesClass       //select[@id='c???_securitiesClass']

c14_securitiesClass       //select[@id='c????_securitiesClass']

And have the following code to handle it:

Try

.DomListBox("c13_securitiesClass").Select(Noteid)

.DomTextField("c23_fromMaturityDat").SetText(Dte)

.DomTextField("c33_toMaturityDate").SetText(Dte)

Catch ex As Exception

.DomListBox("c14_securitiesClass").Select(Noteid)

.DomTextField("c24_fromMaturityDat").SetText(Dte)

.DomTextField("c34_toMaturityDate").SetText(Dte)

EndTry

Is there a better way I can be doing this?  I'm worried about more or less digits being added dynamically to the name.

Can I "detect" the length and react accordingly?

Thank-You!