Open Windows explorer to folder if not already open

I am using the following code to launch Windows explorer to a specified folder. Is there any easy way to test if there is already a window displaying the folder so I don't reopen it?
    Dim sFilePath As String

    On Error GoTo btnOpenFolder_Click_Error
   
    If Dir(PLANPATH & Me.Customer & "\" & Me.JobName, vbDirectory) <> "" Then
        sFilePath = PLANPATH & Me.Customer & "\" & Me.JobName
    Else
        sFilePath = PLANPATH
    End If
   
    On Error Resume Next

    Shell "explorer.exe " & sFilePath, vbNormalFocus

    On Error GoTo 0
    Exit Sub


btnOpenFolder_Click_Error:

    MsgBox Err.Number & " " & Err.Description, , "Error"
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Rob4077Asked:
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chaauCommented:
Use ShellExecute Windows API. It is smart enough to not open another explorer if one already opened for the path:

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

Private Sub Command0_Click()
 Dim sFilePath As String

    On Error GoTo btnOpenFolder_Click_Error
   
    sFilePath = "c:\temp"
   
    On Error Resume Next

    'Shell "explorer.exe " & sFilePath, vbNormalFocus
    ShellExecute 0&, vbNullString, sFilePath, vbNullString, vbNullString, vbNormalFocus

    On Error GoTo 0
    Exit Sub


btnOpenFolder_Click_Error:

    MsgBox Err.Number & " " & Err.Description, , "Error"
End Sub

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I have changed the sFilePath for testing in the code above
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Rob4077Author Commented:
That was an easy solution. Thanks!!!!
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