''Esta Api en un modulo o en las declaraciones del formulario
''
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long

'''''  La variable a contiene el archivo y ruta
'''    Personalizala a tu gusto
''''
ShellExecute Me.hwnd, "Open", a, "", "", 1