The reason why you would not be able to show the IMAQ WinDraw is because it is an independent window and object, this is, is not part of the LabVIEW front panel which you will publish on to the web.
I suggest that you use the intensity graph or a picture control instead, since these are LabVIEW front panel objects they will display the image in the web as well.
Please search for a couple of examples that will demonstrate how to use this two options in this Developer Zone. Use the next link:
http://zone.ni.com/devzone/devzone.nsf/webcategories/430EDB814D4447898625685E0077CB28?opendocument&node=DZ52505_US
Or go to www.ni.com, click on "NI Developer Zone", then click on "Development Library", then click on "Vision", then click on "Image I/O" and then on "Display", h
ere you will find some examples using this two objects.
Good luck!
Nestor Sanchez
IMAQ/Motion Support
National Instruments
Nestor