I have a form which allows users to relaod data at runtime.
Unfortunately, the operation of reloading and/or adding new criteria
records is very slow and you can see all of the control being painted
slowly over the 3 second transacation.   I would like to suspend all
painting, redrawing and refreshing of the panel that contains all of
these user controls (test case as over 4 user controls that are made
up of 10-20 elements each (controls and other user controls)) until
after everything has been added.  I tried a varierty of things,
include SuspendLayout, override OnPaint and only calling
base.OnPaint() when I set a special flag, etc...  It is not working,
when each control is added to another, painting occurs.  I have even
tried dubble buffering sets...  I thought I knew how onPaint worked
before I tackle this problem, but now I'm pretty confused as it seems
drawing is occurring outside of the onPaint events.  Before I started
playign with code I set some counters to see how often onPaint was
called for the most nested userControl I had in the form when I was
creating a new series of criteria record.  I was getting counts of
40-50 onPaint calls during the creation process.

Below is a test refresh function in which I clear the panel and re-
create everything...  I'm using this to try and find a solution for
the painting problems.  The idea if to have a blank screen until
everything is created and then paint the screen, rather than seeing
all sorts of graphic artifacts for a couple of seconds...

private void RefeshCriteria(SortedList<int, CriteriaBase>
sortedCriteria) {
           Refreshing = true;
           //
           // Clear out the old controls.
           //
           panelCriteria.Controls.Clear();
           this.SuspendLayout();

           if (sortedCriteria == null) return;
           //
           // Add each of our criteria controls.  We have to add the
control in reverse list
           // order since the MS docking puts the last control added
on the top of the list
           // when using Top dock style.
           //
           for (int sequence = sortedCriteria.Count; sequence > 0;
sequence--) {
               CriteriaBase criteria = sortedCriteria[sequence];

               CriteriaListComponentControl criteriaControl = new
CriteriaListComponentControl(
                   criteria, filterControls, valueControls,
showMessages);

               criteriaControl.Changed  += new
ChangedDelegate(OnChanged);
               criteriaControl.OnSelect += new
SelectedDelegate(CriteriaSelected);
               criteriaControl.Dock      = DockStyle.Top;

               criteriaControl.SuspendLayout();

               panelCriteria.Controls.Add(criteriaControl);

               criteriaControl.ResumeLayout();
           }

           Refreshing = false;
           this.ResumeLayout();
           this.PerformLayout();
       }