In the constructor for the form (after the call to
InitializeComponent), put them all in a form-level array. OK, so you
have to have 12 lines of code to do *this*, but at least then whenever
you need them you can just loop.

The easiest way is exactly how you have written it in the question - just
put them in an array and loop through the array. No rocket science.

Consider creating a property extender component if you want to do this sort
of thing a lot

Jan,

This isn't the best way in the world to do this, but it is an option:

foreach(TabPage tp in tabControl1.Controls)
{
     foreach(Control c in tp.Controls)
     {
        if (c is RadioButton)
        {
           RadioButton rb = (c as RadioButton);

           if (rb.Name.EndsWith("1"))
              rb.Checked = true;
        }
     }
}

You could check the Name or the Text property to determine which to check.

Note:  The example assumes that the radio buttons are sitting on the tab
page itself.  If the radio buttons are within group boxes, you will need to
interate through all the group boxes sitting on each tab page and and then
interage through group box's controls to find the radio buttons.

Hope this helps.

Dave

You need to set up a container to hold all your twelve RadioButtons.
I would suggest an Array, ArrayList (.NET 1.1) or a List<RadioButton>
(.NET 2.0).  Once all the buttons are in the container then you can
index them: myRadioButtonContainer[i]

rossum

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The ultimate truth is that there is no ultimate truth