How to force the explorer to refesh after the setting change?

Johnny Xia

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Jun 27, 2001, 6:19:47 AM6/27/01

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Hi all,

There is a function SHChangeNotify(), which can be called to notify the
explorer that a file or folder
is changed. But my problem is that I don't change the file or folder, I just
modify the setting of explorer.
After modification I want the explorer to do refreshing. Which function
shall I call? or May I call
SHChangeNotify().

Thanks.
Johnny Xia.

David Lowndes

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Jun 27, 2001, 5:12:06 PM6/27/01

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>... But my problem is that I don't change the file or folder, I just

>modify the setting of explorer.

Johnny,

Which setting are you changing, and how are you changing it?

Dave
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Johnny Xia

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Jun 27, 2001, 9:04:37 PM6/27/01

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I change the value of
HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellState .
This value can enable or disable one-click to open file in the explorer.

Johnny Xia.
"David Lowndes" <dav...@mvps.org> wrote in message
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David Lowndes

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Jun 28, 2001, 2:59:44 AM6/28/01

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>I change the value of
>HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellState .
>This value can enable or disable one-click to open file in the explorer.

I wondered if it might have been something you could change using
SystemParametersInfo, but I can't see it referenced there.

Does anyone have any suggestions for the approved way of changing this
setting?

David Lowndes

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Jun 28, 2001, 6:51:04 AM6/28/01

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I think the setting is readable via SHGetSettings, but there's no
equivalent set function!

Johnny Xia

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Jul 2, 2001, 11:14:01 PM7/2/01

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Dave,

Thanks for your concern of my question. I open the main.cpl with dependance
viewer. This cpl imports lots of noname
functions of shell32.dll. Maybe an undocumented API could do this function.

I tried another way, and almost get the result that I want. After changing
the value of ShellState, I broadcast the
WM_SETTINGCHANGE message with lParam points to a string "ShellState". This
will notify explorer that
system setting changed. But the desktop doesn't refresh immediately. I have
to use the key F5 to manually refresh
the window. So I am thinking that if there is way to refresh the explorer
programatically.

Cheers,
Johnny Xia.

"David Lowndes" <dav...@mvps.org> wrote in message

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Matthew Ellis

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Jul 15, 2001, 2:51:40 PM7/15/01

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"Johnny Xia" <john...@acersoftech.com.cn> wrote in message
news:O5NqjY3$AHA.1768@tkmsftngp03...

> I change the value of
> HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellState .
> This value can enable or disable one-click to open file in the explorer.

It's probably done through a WM_SETTINGCHANGE, which is sent to all
top-level windows. Write a small program to output the string which is
contained in lParam, change the one-click settings in the folder options
window, and see what happens. It should then just be a case of replicating
this message...

Matt
m.t....@bigfoot.com

Dan

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Sep 6, 2001, 3:00:05 PM9/6/01

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This will work like F5 -
::PostMessage( hwndExplorer, WM_COMMAND, 41504, 0 );

Dan

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