Thanks Brian, I just noticed that small remark at the bottom of help info too.

So how do you suggest I handle column size issue in Freeform tree? What's the best way to implement auto resize?

To set the header text: 

this.ultraTree1.ColumnSetGenerated += new ColumnSetGeneratedEventHandler(ultraTree1_ColumnSetGenerated);
void ultraTree1_ColumnSetGenerated(object sender, ColumnSetGeneratedEventArgs e)
{
    UltraTreeNodeColumn column = e.ColumnSet.Columns[0];
    column.Text = "Whatever";
}

There is no way to auto-size columns except when using the OutlookExpress ViewStyle:

this.ultraTree1.ColumnSettings.AutoFitColumns = AutoFitColumns.ResizeAllColumns;

I have a similar problem: a WinTree control that's bound to a BindingList.

There is only one column. Per default this column is much to small and the text in the column header says "Value". As you can imagine I want that single column to use the whole width of the WinTree control - some kind of autosize - and I want to set the header text to a meaningful text.

How can I do these things? Any help will be highly appreciated.

Best regards, Gerald