Question

How can I prevent an Office Custom Task Pane for resizing, so that it’s only and always have the dimensions and can’t be closing with the “close” button.

myCustomTaskPane.Height = 500;
myCustomTaskPane.Width = 500;

Answer 1

Where _tp is a reference to your task pane (not the CustomTaskPane container), _ctp is the CustomTaskPane container, iw is the InspectorWrapperDictionary:

 void _tpvals_VisibleChanged(object sender, System.EventArgs e)
        {
            _tp.tmr.Start();
        }

And, in your task pane code:

public Timer tmr;

        public taskpane()
        {
            InitializeComponent();

            tmr = new Timer() { Interval = 500 };
            tmr.Tick += new EventHandler(tmr_Tick);
            tmr.Enabled = true;
            tmr.Stop();
        }


void tmr_Tick(object sender, EventArgs e)
        {
            if (iw == null)
                setVars();

            if (_tp.lv_AttachmentList.Items.Count > 0)
                _ctp.Visible = true;

            tmr.Stop();
        }

setvars() is a command to pull in the proper iw and set the references to _tp and _ctp