Looping Through ToolStrip Items To Uncheck?

When one is clicked, would like to be able to have it checked, and uncheck all the restCheckOnClick will not uncheck the rest (I want an effect similar to radio buttons).My first plan was to loop through each item in the ToolStrip Items() array, however these are ToolStripItems (which are a base class) and thus do not have the Checked property. So then I thought about using CType to convert them to ToolStripButtons, which do have the Checked property, except what should I do about the ToolStripSplitButtons?I basically want to say, "if this ToolStripItem is as ToolStripButton, then uncheck it"