FredixBlog

This is the same function as the Shell() function, but in this case the code will wait until the called program is finished.
Private Const STARTF_USESHOWWINDOW& = &H1
Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const INFINITE = -1&

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
Public Sub ShellWait(Pathname As String, Optional WindowStyle As Long)
   Dim proc As PROCESS_INFORMATION
   Dim Start As STARTUPINFO
   Dim ret As Long
   ’ Initialize the STARTUPINFO structure:
   With Start
       .cb = Len(Start)
       If Not IsMissing(WindowStyle) Then
           .dwFlags = STARTF_USESHOWWINDOW
           .wShowWindow = WindowStyle
       End If
   End With
   ’ Start the shelled application:
   ret& = CreateProcessA(0&, Pathname, 0&, 0&, 1&, _
           NORMAL_PRIORITY_CLASS, 0&, 0&, Start, proc)
   ’ Wait for the shelled application to finish:
   ret& = WaitForSingleObject(proc.hProcess, INFINITE)
   ret& = CloseHandle(proc.hProcess)
End Sub