Tooltips on mapguide

[المشرف العام]

excuse me..
I want to ask you ,
does anyone know how to make tooltips on mapguide like this link :http://2.bp.blogspot.com/_tWgkJLZDMpc/SmCGVNF3EVI/AAAAAAAAAIE/EhqvfXx20gM/s1600-h/imageTooltip.png.

????

Anyone know ?
Please helpme and make me understand..
Thanks All

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