API question please(Urgent please)

I have the following code in VB.

My intension is to wait until the user closes the dos program and then resume the remaining VB code.

'start program
Public Declare Function GetModuleUsage Lib "Kernel32" (hModule As Long)

Private Sub Command1_Click()
WaitShell "c:\winnt\system32\command.com"
'resume the following codr after the dos is closed
dim x as integer
x=10
...
..
End Sub

Private Function WaitShell(appname As String)
Dim hMod As Long
hMod = Shell(appname, 1)
If (Abs(hMod) > 32) Then
While (GetModuleUsage(hMod))
DoEvents
Wend
Else
MsgBox "Unable to start " & appname
End If
End Function
'end program


****
But when i run the above code, i always get the error
***
"Can't find DLL entry GetModuleUsage in Kernel32"
"Run Time error 453"
***


May be iam not using the DLL correctly, please correct me.
Or please give me any other solution.
Urgent please
Thanks

This code will probably be better........

This code was copied from the MSDN library........

Code:

---



  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
      cbReserved2 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 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

  Private Declare Function GetExitCodeProcess Lib "kernel32" _
      (ByVal hProcess As Long, lpExitCode As Long) As Long

  Private Const NORMAL_PRIORITY_CLASS = &H20&
  Private Const INFINITE = -1&

  Public Function ExecCmd(cmdline$)
      Dim proc As PROCESS_INFORMATION
      Dim start As STARTUPINFO

      ' Initialize the STARTUPINFO structure:
      start.cb = Len(start)

      ' Start the shelled application:
      ret& = CreateProcessA(0&, cmdline$, 0&, 0&, 1&, _
        NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc)


      ' Wait for the shelled application to finish:
        ret& = WaitForSingleObject(proc.hProcess, INFINITE)
        Call GetExitCodeProcess(proc.hProcess, ret&)
        Call CloseHandle(proc.hThread)
        Call CloseHandle(proc.hProcess)
        ExecCmd = ret&
  End Function

  Sub Form_Click()
      Dim retval As Long
      retval = ExecCmd("notepad.exe")
      MsgBox "Process Finished, Exit Code " & retval
  End Sub

---