How to click Alt+Double click in browser using vb.Net

Hi,

My Requirement is i want to open one browser and navigate to google.com
Then i want click Alt+Double click on the browser.
Please help me...
My Code is::mad:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

IE = CreateObject("InternetExplorer.Application")
IE.navigate("http://www.google.co.in")
IE.Visible = True
Do Until IE.readyState = 4
'DoEvents()
Loop

SetCursorPos(300, 100)
wshShell = CreateObject("WScript.Shell")
wshShell.SendKeys("%") ' To press Alt key.
mouse_event(MOUSEEVENTF_LEFTDOWN, 300, 100, 0, 0)
mouse_event(MOUSEEVENTF_LEFTUP, 300, 100, 0, 0)
mouse_event(MOUSEEVENTF_LEFTDOWN, 300, 100, 0, 0)
mouse_event(MOUSEEVENTF_LEFTUP, 300, 100, 0, 0)
End Sub