Attribute VB_Name = "ShellAndWait"
Private 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
    cdReserved2 As Integer
    lpReserved2 As Long
    hStdInput As Long
    hStdOutput As Long
    hStdError As Long
End Type

Private Type PROCESS_INFORMATION
    hProcess As Long
    hThread As Long
    dwProcessID As Long
    dwThreadID As Long
End Type

Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const INFINITE = -1& ' API
Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long

Private 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
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Public Function ExecCmd(cmdline$)
    Dim proc As PROCESS_INFORMATION
    Dim start As STARTUPINFO
    Dim ret&
    start.cb = Len(start)
    ret& = CreateProcessA(0&, cmdline$, 0&, 0&, 1&, NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc)
    ret& = WaitForSingleObject(proc.hProcess, INFINITE)
    ret& = CloseHandle(proc.hProcess)
End Function

Public Function CallExistAcad(ByVal DrawName As String)
   'setup AutoCAD interface
   On Error Resume Next
   Set AMM_acadapp = GetObject(, "AutoCAD.Application")  'if no error 429 then ACAD already loaded
   If Err Then
      If Err.Number = 429 Then
         Err.Clear
         'AutoCAD no loaded so load ACAD app
         Set AMM_acadapp = CreateObject("AutoCAD.Application")
         AMM_acadapp.WindowState = acMax
      End If
   End If
   Set AMM_acaddoc = AMM_acadapp.Documents.Open(DrawName)
End Function


'Example from Simon
'Public AMM_acaddoc As AcadDocument
'Public AMM_acadapp As AcadApplication
'Public Function HowToCallAcad()
'   'setup AutoCAD interface
'   On Error Resume Next
'   Set AMM_acadapp = GetObject(, "AutoCAD.Application")  'if no error 429 then ACAD already loaded
'   If Err Then
'      If Err.Number = 429 Then
'         Err.Clear
'         'AutoCAD no loaded so load ACAD app
'         Set AMM_acadapp = CreateObject("AutoCAD.Application")
'         AMM_acadapp.WindowState = acMax
'      End If
'   End If
'   Set AMM_acaddoc = AMM_acadapp.Documents.Open("test.dwg")
'End Function