BACKSPACE key doesn't do anything in IE EXPLORER BAR )TOOLBAR) vc++

[anuj.juthani]

i have a combo box control in a INTERNET EXPLORER TOOLBAR. the backspace key of keyboard works fine if this combobox is made dropdown enabled But if i disable the drop down feature of this combo box then backspace doesn't work . Moreover if i add a EDIT CONTROL instead of COMBOBOX control then too the same thing persist i.e. the BACKSPACE doesn't work ! i have search the web a lot for this issue but cuold not find anything which is problem solving !

i am using visual studio 2010 for making an IE toolbar the IE version in which i am viewing the output is IE7

AND THE PROJECT IS AN ATL PROJECT