Option Explicit
Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwProcessId As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject 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 P_HANDLE As Long
Private P_PID As Long
Private Const PROCESS_ALL_ACCESS = &H1F0FFF
' constantes para SendMessage
Private Const WM_LBUTTONDBLCLK As Long = &H203 ' izquierdo doble click
Private Sub Command1_Click()
If FindWindow(vbNullString, "BlueStacks App Player for Windows (beta-1)") Then
   GetWindowThreadProcessId FindWindow(vbNullString, "BlueStacks App Player for Windows (beta-1)"), P_PID
   P_HANDLE = OpenProcess(PROCESS_ALL_ACCESS, False, P_PID)
End If
Timer1.Interval = 500
End Sub
Private Sub Form_Unload(Cancel As Integer)
CloseHandle P_HANDLE
End Sub
 
Private Sub Timer1_Timer()
    Call SendMessage(P_HANDLE, WM_LBUTTONDBLCLK, 1, ByVal 0&)
End Sub
 

Option Explicit
 
' función SendMessage
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" ( _
    ByVal hwnd As Long, _
    ByVal wMsg As Long, _
    ByVal wParam As Long, _
    ByVal lParam As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
 
Private Const WM_LBUTTONDBLCLK As Long = &H203
 
Private Function MakeDWord(ByVal LoWord As Integer, ByVal HiWord As Integer) As Long
MakeDWord = (HiWord * &H10000) Or (LoWord And &HFFFF&)
End Function
 
Public Sub SimDobleClick(ByVal hwnd As Long, ByVal PosX As Integer, ByVal PosY As Integer)
Call SendMessage(hwnd, WM_LBUTTONDBLCLK, 0, MakeDWord(PosX, PosY))
End Sub
 
Private Sub Command1_Click()
Call SimDobleClick(FindWindow(vbNullString, "CLICKME"), 100, 100)
End Sub