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Thank you chensu.<br />
<br />
Beside me revision on the second point:<br />
I had in mind not adjustment concrete screensaver, but adjustment screensaver in general, timeout, for instance.<br />
<br />
If I can set or get a system parameter using function SystemParametersInfo(), why I can not learn of change of these system parameters, concerning only screensaver?<br />
<br />
Or how can I detect/catch system parameters changes, concerning screen saver
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Thank you chensu.

Beside me revision on the second point:
I had in mind not adjustment concrete screensaver, but adjustment screensaver in general, timeout, for instance.

If I can set or get a system parameter using function SystemParametersInfo(), why I can not learn of change of these system parameters, concerning only screensaver?

Or how can I detect/catch system parameters changes, concerning screen saver

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The system sends the WM_SETTINGCHANGE message only if the SystemParametersInfo caller specifies the SPIF_SENDCHANGE flag. You may use Spy++ with a top-level window to see if the message is sent.
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The system sends the WM_SETTINGCHANGE message only if the SystemParametersInfo caller specifies the SPIF_SENDCHANGE flag. You may use Spy++ with a top-level window to see if the message is sent.

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<div class="content wysiwyg-content">
I need help in two questions:<br />
<br />
1. How application can configure or preview screensaver?<br />
<br />
2. Why ON_WM_SETTINGCHANGE() message handler can not respond to changing the system settings, concerning screensavers. On other cases it works...<br />
<br />
I use MSVC++ 6.0 &amp;&nbsp;MFC...<br />
<br />
Beforehand thanked, Sergeyka.
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I need help in two questions:

1. How application can configure or preview screensaver?

2. Why ON_WM_SETTINGCHANGE() message handler can not respond to changing the system settings, concerning screensavers. On other cases it works...

I use MSVC++ 6.0 & MFC...

Beforehand thanked, Sergeyka.

ScreenSaver

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.