How do I make a window modal that was opened using Shell Execute.

[RealisticGraphics]

How do I make a window modal that was opened using Shell Execute? I'm using the following code that I found on VB-World to display a property box for files, but I would like the property window to be modal when it opens up or at least cancel the window when it losses focus. The flag may already be listed in the code and I'm just missing it. Thanks:


Public Const SEE_MASK_INVOKEIDLIST = &HC
Public Const SEE_MASK_NOCLOSEPROCESS = &H40
Public Const SEE_MASK_FLAG_NO_UI = &H400

Declare Function ShellExecuteEX Lib "shell32.dll" Alias "ShellExecuteEx" (SEI As SHELLEXECUTEINFO) As Long

Type SHELLEXECUTEINFO
cbSize As Long
fMask As Long
hwnd As Long
lpVerb As String
lpFile As String
lpParameters As String
lpDirectory As String
nShow As Long
hInstApp As Long
lpIDList As Long
lpClass As String
hkeyClass As Long
dwHotKey As Long
hIcon As Long
hProcess As Long
End Type

Public Sub ShowProps(FileName As String, OwnerhWnd As Long)

Dim SEI As SHELLEXECUTEINFO
Dim r As Long

With SEI
.cbSize = Len(SEI)
.fMask = SEE_MASK_NOCLOSEPROCESS Or _
SEE_MASK_INVOKEIDLIST Or SEE_MASK_FLAG_NO_UI
.hwnd = OwnerhWnd
.lpVerb = "properties"
.lpFile = FileName
.lpParameters = vbNullChar
.lpDirectory = vbNullChar
.nShow = 0
.hInstApp = 0
.lpIDList = 0
End With

r = ShellExecuteEX(SEI)
End Sub