Igor Delovski Board

[Ike]

CodeGuru: Handling OS Shut Down in Windows Vista,
by Nick Wienholt

"The way Vista closes applications during operating system shut down
has changed from prior Windows versions' approaches. Learn how to provide
your users with appropriate notification from the Vista shut down screen."

[delovski]

Intel - PeekMessage: Optimizing Applications for Extended Battery Life

"Learn if PeekMessage calls have an impact on battery life in this paper with
examples showing alternative code samples and the improvements that can
be expected on Windows*."

[Ike]

RC: The cost of continuously-visible affordances with dynamic states

"Lazy evaluation means that the user doesn't pay for something until they
use it. In this case, paying for the cost of calculating whether the menu item
should be enabled or not. Depending on the program, calculating whether a
menu item should be enabled can turn out to be rather expensive, so it's
natural to avoid doing it whenever possible. ('I can do nothing really fast.')"

[delovski]

ordering WM_QUERYENDSESSION

"> I have an application designed to intercept shutdown calls before an
> other application receives it , is there any way i can make sure my
> application gets the WM_QUERYENDSESSION message first?

Use SetProcessShutdownParameters() "

[delovski]

How to draw my own style of window

"> how to use WM_NCPAINT and functions like   DrawCaption(...) to draw my own
> style of window?

In general you cannot do this anymore because of the new 'Vista glass' DWM api."

[delovski]

Resizing window causes extreme flicker

"The code I have now functions fine, it's just that when the window resizes
the scroll bar flickers horribly."

[XNote]

RC: Why do we even have the DefWindowProc function?

"With the DefWindowProc model, we can do this by calling DefWindowProc to
do the default processing, and then modifying the result on the back end. If
we had use the dialog-box-like model, there would have been no way to call
the "default handler" as a subroutine in order to make it to the heavy lifting.
We would be forced to do all the work or none of it."

[delovski]

RC: Windows doesn't close windows when a user logs off; that's your call

"Commenter Peter Kankowski asks why Windows doesn't send WM_CLOSE and
WM_DESTROY messages when the user logs off.

That's what WM_ENDSESSION is for. To tell the program that the Windows
session is ending, and that you should get done whatever last things you want
to get done before the world comes to an end."

[Ike]

RC: What does TranslateAccelerator do?

"For some reason, there appears to be some confusion over what
TranslateAccelerator does. It's very simple, and it's all spelled out
in the documentation. You give it a message, and if the message
is a keypress that matches an entry in the accelerator table, the
corresponding WM_COMMAND or WM_SYSCOMMAND message is
sent to the window you said you are translating messages for."

[delovski]

RC: Why bother with RegisterWaitForSingleObject when you have MsgWaitForMultipleObjects?

"If you're so clever that you can modify every call to PeekMessage, GetMessage,
and WaitMessage, then more power to you. But in order to do this, you'll have
to restrict the functions you call, because all sorts of functions contain their own
message loops. Do you call MessageBox? Or DialogBox? Those functions contain
a modal loop."

[delovski]

RC: Why doesn't the MoveWindow function generate the WM_GETMINMAXINFO
message?

"If you don't trust yourself to follow your own rules, you can intercept the at-
tempt to change the window size by handling the WM_WINDOWPOSCHANGING
message."

[XNote]

RC - Sure, I can get spurious WM_MOUSEMOVE messages, but why
do they keep streaming in?

"Or, as the author of linked posting above eventually figured out, it might be
a buggy wireless mouse which not only is sucking down your CPU and preve-
nting your screen saver from running, but is also draining your wireless mo-
use battery!"

[Ike]

so - SetWindowTextW in an ANSI project

"SetWindowText()/SetWindowTextA() and SetWindowTextW() are all really
WM_SETTEXT which is one of the few messages subject to code-page
translation when you create a multibyte/Ansi window. This means there is no
W and A versions of the message. All you need to do is intercept the
WM_SETTEXT message in your window and pass the arguments to
DefWindowProcW() instead of the usual DefWindowProcA/DefWindowProc()."

[Ike]

MS - Support snap layouts for desktop apps on Windows 11

"If the app's window has the maximize caption button available, the system
will automatically show snap layouts when a user hovers the mouse over the
window's maximize button. Snap layouts will appear automatically for most
apps, but some desktop apps may not show snap layouts. This topic describes
how to make sure your app shows the menu with snap layouts if the system
does not show it automatically."