expandable property in property window

hi,
i generate a user control and i could add into toolbox. i added some new properties to the user control. but i want that these properties can be expandable into property browser.
for example:
"size" property of any form control has two sub properties as "width" and "heigth" and these can be viewed in property browser.
i want to add properties to my user control like "size" property but i can not.
how can I implement this property?
Thanks
[515 byte] By [codefund.com] at [2008-2-26]
# 1
<a href=" http://www.windowsforms.net/Forums/ShowPost.aspx?tabIndex=1&tabId=41&PostID=1525">expandable property in property browser</a>
codefund.com at 2007-9-8 > top of Msdn Tech,Windows Forms,Windows Forms Designer...