Not with "native" Window's settings, but it can be accomplished easily with this
small [free] program called NirCmd.exe.
The command for keeping a window on top at all times is :
nircmd.exe win settopmost title "My Program" 1
....you would replace "My Program" with what appears in the "Title-bar" (at the top of
the program's window).
You can download "NirCmd.exe" by clicking on the link below :
http://www.nirsoft.net/utils/nircmd.zip
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Cheers, Tim Meddick, Peckham, London.