Professional IronPython

LISTINg 9-4: 
 Queryable information for GetSetting()
SSF_SHOWALLOBJECTS = 0x00000001
SSF_SHOWEXTENSIONS = 0x00000002
SSF_HIDDENFILEEXTS = 0x00000004
SSF_SERVERADMINUI = 0x00000004
SSF_SHOWCOMPCOLOR = 0x00000008
SSF_SORTCOLUMNS = 0x00000010
SSF_SHOWSYSFILES = 0x00000020
SSF_DOUBLECLICKINWEBVIEW = 0x00000080
SSF_SHOWATTRIBCOL = 0x00000100
SSF_DESKTOPHTML = 0x00000200
SSF_WIN95CLASSIC = 0x00000400
SSF_DONTPRETTYPATH = 0x00000800
SSF_SHOWINFOTIP = 0x00002000
LISTINg 9-3 
(continued)
548592c09.indd 188
2/24/10 12:48:24 PM
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Performing Late Binding Using Marshal.GetActiveObject()
 
❘
 
189
SSF_MAPNETDRVBUTTON = 0x00001000
SSF_NOCONFIRMRECYCLE = 0x00008000
SSF_HIDEICONS = 0x00004000
SSF_FILTER = 0x00010000
SSF_WEBVIEW = 0x00020000
SSF_SHOWSUPERHIDDEN = 0x00040000
SSF_SEPPROCESS = 0x00080000
SSF_NONETCRAWLING = 0x00100000
SSF_STARTPANELON = 0x00200000
SSF_SHOWSTARTPAGE = 0x00400000
fIguRE 9-15: 
The shell objects provide access to all sorts of useful information.
The third method, 
ExplorerPolicy()
, is a registry-based query that relies on bit positions
to define a value. You find these values in the 
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\Explorer
registry key. The two most common policies are 
NoDriveAutorun
and 
NoDriveTypeAutoRun
. When working with the 
NoDriveAutorun
policy, 
Windows enables or disables autorun on a drive letter basis where bit 0 is drive A and bit 25 is 
drive Z. Listing 9-3 shows how to work with the bits for the 
NoDriveTypeAutoRun
policy, while 
Figure 9-15 shows the results for the host machine.
You can find a number of other examples of this kind of late binding for IronPython on the Internet. 
For example, you can see a Word late binding example at 
http://www.ironpython.info/index 
.php/Extremely_Late_Binding
. This particular example would possibly be the next step for many 
developers in working with 
Activator.CreateInstance()
. The important thing to remember is 
that this method is extremely flexible and that you need to think of the impossible, as well as the 
possible, when using it.