Application.EnableVisualStyles()
Application.DoEvents()
it worked.(My OS is Windows XP) But when i click the commandbar button
again, it showed application has encountered a serious problem and
restarted.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vbtchUsingWindowsXPVisualStylesWithControlsOnWindowsForms.asp
was my reference to create manifest file.
Any help will be appreciated