'Call Date and Time Zone Property[Shell Script]
'Tested in XP not on Vista
'Take one button and write following code in its click event:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Shell("rundll32.exe shell32.dll,Control_RunDLL timedate.cpl,,0", vbNormalFocus)
End Sub
End Class