Ti allego il codice da inserire in un modulo:

codice:
Option Explicit

Public Type STARTUPINFO
        cb As Long
        lpReserved As String
        lpDesktop As String
        lpTitle As String
        dwX As Long
        dwY As Long
        dwXSize As Long
        dwYSize As Long
        dwXCountChars As Long
        dwYCountChars As Long
        dwFillAttribute As Long
        dwFlags As Long
        wShowWindow As Integer
        cbReserved2 As Integer
        lpReserved2 As Long
        hStdInput As Long
        hStdOutput As Long
        hStdError As Long
        End Type
        Public Type PROCESS_INFORMATION
        hProcess As Long
        hThread As Long
        dwProcessId As Long
        dwThreadID As Long
End Type
    
Public Declare Function WaitForSingleObject Lib "kernel32" (ByVal _
        hHandle As Long, ByVal dwMilliseconds As Long) As Long
    
Public Declare Function CreateProcessA Lib "kernel32" (ByVal _
        lpApplicationName As Long, ByVal lpCommandLine As String, ByVal _
        lpProcessAttributes As Long, ByVal lpThreadAttributes As Long, _
        ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, _
        ByVal lpEnvironment As Long, ByVal lpCurrentDirectory As Long, _
        lpStartupInfo As STARTUPINFO, lpProcessInformation As _
        PROCESS_INFORMATION) As Long
    
Public Declare Function CloseHandle Lib "kernel32" (ByVal _
        hObject As Long) As Long
    
Public Const NORMAL_PRIORITY_CLASS = &H20&
Public Const INFINITE = -1&
    
'#########################################################
'Funzione per lanciare un programma in sincrono.
'Il programma lanciato in finestra viene 'atteso' per
'tutta la sua durata.
'Una funzione usata per lanciare un programma MS-DOS
'e attendere la sua fine.
'1998 by Berardi Paolo
'Email pberardi@nt.kjws.com
'#########################################################
Public Sub ShellAndWait(ByVal RunProg As String)

    Dim RetVal As Long
    Dim proc As PROCESS_INFORMATION
    Dim StartInf As STARTUPINFO
    
    
    StartInf.cb = Len(StartInf)
    'Crea sessione del programma da lanciare
    RetVal = CreateProcessA(0&, RunProg, 0&, 0&, 1&, NORMAL_PRIORITY_CLASS, 0&, 0&, StartInf, proc)
    RetVal = WaitForSingleObject(proc.hProcess, INFINITE)
    RetVal = CloseHandle(proc.hProcess)

End Sub
Poi in un eventuale pulsante, per provare:

codice:
Private Sub Command1_Click()
ShellAndWait ("Calc.exe")
MsgBox ("Calcolatrice Chiusa!")
End Sub
Vorrei segnalare che non è farina del mio sacco.. un po' di tempo fa l'ho scaricato/trovato su internet e uso questa funzione così com'è!

Ciao