Remove DotNET menu dropdown grey area for icons

How do I remove the area in a dropdown menu where the menu item icons are typically displayed?

DropDownMenuGreyAreaHeadAche http://en.wiki.mcneel.com/content/upload/images/MenuImageBar.png

I just nee开发者_如何学编程d to remove the grey area in this particular dropdown, other dropdowns of menu items in the same menu bar need to retain this area because they do have icons.

Edit: This is WinForms.

You just need to set the ShowImageMargin property of the menu to false