First rendering of a fixed-size (MSWindowsFixedSizeDialogHint) Tool, Dialog or SubWindow is too small

The following also appears at the top of the attached file:

Important Note! The described behavior is for MS Windows 8.1 Pro!
I cannot speak for any other OS or different Windows version.

In this file, a fixed-size pixelWindow is displayed when a
resolution is selected from the Resolution menu. The very first
time this window displays, it is too small to fit the defined
rectangle. (Note the missing top and right borders!)

If I change the resolution to something different, the window
finally resizes correctly. (Note: just turning the window Off
and on again is not enough! The x- or yResolution must change -
see semi-workaround in code below)

After resizing once, the window always resizes correctly.
Only the very first rendering is affected by this problem!

I am assuming that I have forgotten some important initialization
step, or rendering dependency but I have not been able to find this
yet, so I am submitting it as a bug, possibly due to MS Windows 8.1.
I have tried several variations, which are commented out below and
can be commented back in for testing.