to tell when shellexecute has opened

[Megatron]

Or use EnumWindows.

Add to a Module.

Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
Declare Function EnumWindows Lib "user32.dll" (ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long

Public Function EnumWindowsProc(ByVal hwnd As Long, ByVal lParam As Long) As Long
    Dim Length As Long
    Dim sName As String
    Dim Temp As String
    Static iCount As Integer
    
    iCount = iCount + 1
    Length = GetWindowTextLength(hwnd) + 1
    
    If Length > 1 Then
      sName = Space(Length)
      GetWindowText hwnd, sName, Length
      Debug.Print Left(sName, Length - 1)
    End If
    
    EnumWindowsProc = 1
End Function

Usage

EnumWindows AddressOf EnumWindowsProc, 0

This will give you a list of all open windows. Then you can just find the window in the list.