'Значит, так...
'2 По-моему, можно воспользоваться
Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
'Ты ведь знаешь заголовок окна?
'А передавать окну клики можно через SendMessage:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_LBUTTONDBLCLK = &H203
Private Const SW_SHOW = 5
YourWindowHwnd=FindWindow(vbNullString, YourWindowTitle)
SendMessage YourWindowHwnd, WM_LBUTTONDBLCLK, 0, 0
ShowWindow YourWindowHwnd, SW_SHOW
'По-моему, всё правильно (но я не проверял)
'Если что, пиши - разберёмся...