The tricky bit here is ensuring width is at least 200px under the web framework's column system, otherwise:

Object oMyImage is a cWebImage
    Set piColumnIndex to ???
    Set piColumnSpan to 3  // ??? Going to be wide enough?  Dunno...  Also depends on psLabel, piLabelOffest and peLabelPosition
    Set psURL to "Images/MyImage.jpg"
    Set piHeight to 200
    Set piMinHeight to 200   // Ensure it never get too small, maybe?
    Set pePosition to wiFitEnd_Object
Experiment with different pePosition settings to see the different options and their results. You might want to play with pbFitZoom as well.