this is how to do it! step by step!,
1. add a toolstrip and make a toolstriptextbox,
2.add a toolstripbutton,
3.double click the button on your toolstrip, and make this code,
Private Sub ToolStripButton8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton8.Click
WebBrowser1.Navigate("http://www.google.com/search hl=en&q=" + ToolStripTextBox2.Text + "&btnG=Google+Search")
End Sub