'no módulo

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
Public Const conSwNormal = 1

'no form

CmdAbrir_click
    Dim sFile As String
    With D1
        .DialogTitle = "Abrir..."
        .CancelError = False
        .Filter = "Execultáveis (*.exe)|*.exe|Todos os arquivos (*.*)|*.*"
        .ShowOpen
        If Len(.FileName) = 0 Then
            Exit Sub
        End If
        sFile = .FileName
    End With

ShellExecute hwnd, "open", sfile, vbNullString, vbNullString, conSwNormal