[RESOLVED] Passing multiple controls to a function

[riechan]

I use this code to display errors in the form:

    Public Sub CheckIndex(ByRef _Control As ComboBox)
        If _Control.SelectedIndex = -1 Then
            HighlightError(_Control, errMissing)
            blnMissing = True
        End If
    End Sub

And as you guys might already know just send in the combo boxes one by one to the function for validation. I have at least 30 combo boxes to validate, and validating them one by one is tedious and quite frankly, lengthy. Is there any way I can pass them to the function for validation? They're named like so:

- cboT1Combo1, cboT1Combo2...
- cboT2Combo1, cboT2Combo2...

and so on and so forth. Another question I'd like to ask is, I've already set the SelectedIndex property of each combo box to 0 on load, will the SelectedIndex of those combo box possibly become -1 anytime during runtime?