C#

// columnIndex must be set to a number.
int columnIndex = 1;
// remove the second column
GridColumnStylesCollection myGridColumns;
myGridColumns = dataGrid1.TableStyles[0].GridColumnStyles;
myGridColumns.RemoveAt( columnIndex );

GridColumnStylesCollection myGridColumns;
myGridColumns = dataGrid.TableStyles[0].GridColumnStyles;
 
foreach(DataGridColumnStyle style in myGridColumns)
{
  // GetColumnWidth takes the header name and returns the width the column should be
  style.Width = GetColumnWidth(style.HeaderName);
}

if(checkBox1.Checked)
{
    MessageBox.Show("Checkbox1 is checked");
}

if (radioButton1.Checked)
{
    MessageBox.Show("radioButton1 is checked");
}