[ros-kernel] Re: [ros-cvs] CVS Update: reactos (CursorBlinkRate)

[Thomas Weidenmueller]

Skywing wrote:

>I think the control panel applet might use that function for its
>preview-selected-blink-rate area.
>
>-----Original Message-----
>From: ros-kernel-bounces at reactos.com [mailto:ros-kernel-bounces at reactos.com]
>On Behalf Of Richard Campbell
>Sent: Saturday, November 22, 2003 4:27 AM
>To: ReactOS Kernel List
>Subject: Re: [ros-kernel] Re: [ros-cvs] CVS Update: reactos
>(CursorBlinkRate)
>
>SetCaretBlinkTime Function 
>
>The SetCaretBlinkTime function sets the caret blink time to the specified
>number of milliseconds. The blink time is the elapsed time, in milliseconds,
>required to invert the caret's pixels. 
>Syntax
>BOOL SetCaretBlinkTime(      
>    UINT uMSeconds
>);
>Parameters
>uMSeconds
>[in] Specifies the new blink time, in milliseconds. 
>Return Value
>If the function succeeds, the return value is nonzero.
>If the function fails, the return value is zero. To get extended error
>information, call GetLastError. 
>
>Remarks
>The user can set the blink time using the Control Panel. Applications should
>respect the setting that the user has chosen. The SetCaretBlinkTime function
>should only be used by application that allow the user to set the blink
>time, such as a Control Panel applet. (wouldn't this suggest that the
>control panel applet uses this call?  this is what i based my changes off
>from, msdn.)
>If you change the blink time, subsequently activated applications will use
>the modified blink time, even if you restore the previous blink time when
>you lose the keyboard focus or become inactive. This is due to the
>multithreaded environment, where deactivation of your application is not
>synchronized with the activation of another application. This feature allows
>the system to activate another application even if the current application
>is hung. 
>Function Information
>Header
>Declared in Winuser.h, include Windows.h
>Import library
>User32.lib
>Minimum operating systems
>Windows 95, Windows NT 3.1
>See Also
>Carets Overview, GetCaretBlinkTime
>
>
>Thomas Weidenmueller wrote:
>
>Richard Campbell wrote: 
>
>
>CVSROOT:    /CVS/ReactOS 
>Module name:    reactos 
>Repository:    reactos/subsys/win32k/ntuser/ 
>Changes by:    rcampbell at mok.osexperts.com.(none)    03/11/21 17:49:39 
>
>Modified files: 
>    reactos/subsys/win32k/ntuser/: caret.c 
>Log message: 
>    CursorBlinkRate is now loaded via the registry. 
>
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>
>
>  
>Windows doesn't change the value in the registry if you call
>SetCaretBlinkTime() and it also doesn't query the registry if you call
>GetCaretBlinkTime(). The value is loaded after login (i guess through
>winlogon.exe) from the registry and it is only saved to the registry if you
>change it with the control panel. 
>
>Regards 
>Thomas 
>
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>
>  
>
The current implementation should match that one of windows, if you want 
to save the changed value in windows you also need to write the value 
manually to the registry, there's no function for this purpose.

Regards
Thomas