Hola!!
Intenta esto:
Código vb:
Ver original' EN UN MODULO
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
'EN UN BOTON
ShellExecute Me.hwnd, vbNullString,
"mailto:" &
"[email protected]", vbNullString,
"c:\", 0
Te abre el manejador del correo por defecto en la PC con la direccion de correo que especificaste
Es Codigo VB6.0