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The Old New Thing
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    The Old New Thing

    May 2013 - The Old New Thing

    Posted messages are processed ahead of input messages, even if they were posted later
    Posted messages are processed ahead of input messages, even if they were posted later
    May 31, 2013 May 31, 2013 05/31/13
    Raymond Chen
    Regardless of which interpretation you use, it remains the case that posted messages are processed ahead of input messages. Under the MSDN interpretation, posted messages and input messages all go into the message queue, but posted messages are pulled from the queue before input messages. Under the Raymond interpretation, posted messages ...

    Comments are closed.0Code
    The posted message queue vs the input queue vs the message queue
    The posted message queue vs the input queue vs the message queue
    May 30, 2013 May 30, 2013 05/30/13
    Raymond Chen
    There are multiple ways of viewing the interaction between posted messages and input messages. MSDN prefers to view posted messages and input messages as part of one giant pool of messages in a message queue, with rules about which ones get processed first. I, on the other hand, prefer to think of posted messages and input messages as ...

    Comments are closed.0Code
    What’s the point of SecureZeroMemory?
    What’s the point of SecureZeroMemory?
    May 29, 2013 May 29, 2013 05/29/13
    Raymond Chen
    The Secure­Zero­Memory function zeroes out memory in a way that the compiler will not optimize out. But what's the point of doing that? Does it really make the application more secure? I mean, sure the data could go into the swap file or hibernation file, but you need to have Administrator access to access those files anyway, and you ...

    Comments are closed.0Code
    Why don’t hotkeys for items on my Start menu work when I am in a fullscreen application?
    Why don’t hotkeys for items on my Start menu work when I am in a fullscreen application?
    May 28, 2013 May 28, 2013 05/28/13
    Raymond Chen
    You can set a hotkey on the shortcuts in your Start menu, and Explorer will launch that shortcut when you press the hotkey, but not if you are in a fullscreen application, like when you set Paint into fullscreen mode, or when you are displaying a PowerPoint presentation. Why are shortcut hotkeys ignored when a fullscreen application is running...

    Comments are closed.0Tips/Support
    What are the scoping rules for variables in nested courtyards?
    What are the scoping rules for variables in nested courtyards?
    May 27, 2013 May 27, 2013 05/27/13
    Raymond Chen
    I dreamed that I had to fix a bug caused by variable redeclaration inside a nested courtyard. Had to move the horses out of the way first. And then it got weird. I won't go into the orchestra rehearsal that turned out to be just a recording played on a loudspeaker in an empty concert hall. Because you wouldn't believe that part...

    Comments are closed.0DreamOther
    How do I customize the console properties for a shortcut to a console application?
    How do I customize the console properties for a shortcut to a console application?
    May 27, 2013 May 27, 2013 05/27/13
    Raymond Chen
    You already know how to create a shortcut: #include <windows.h> #include <tchar.h> #include <shlobj.h> #include <atlbase.h> // class CCoInitialize incorporated here by reference int __cdecl _tmain(int argc, TCHAR **argv) { // error checking elided for expository purposes CCoInitialize init; CComPtr<IShellLink...

    Comments are closed.0Code
    What happens if I manually post an auto-generated message into my message queue?
    What happens if I manually post an auto-generated message into my message queue?
    May 24, 2013 May 24, 2013 05/24/13
    Raymond Chen
    As we well know, the window manager generates various messages on-demand rather than posting them into the queue at the time the event occurs. But what happens if you manually post one of these messages, like Post­Message(hwnd, WM_PAINT, 0, 0)? Does that clear the internal flag that says "This window needs a paint message?" Nope. The...

    Comments are closed.0Code
    Even though mouse-move, paint, and timer messages are generated on demand, it’s still possible for one to end up in your queue
    Even though mouse-move, paint, and timer messages are generated on demand, it’s still possible for one to end up in your queue
    May 23, 2013 May 23, 2013 05/23/13
    Raymond Chen
    We all know that the generated-on-demand messages like WM_MOUSE­MOVE, WM_PAINT, and WM_TIMER messages are not posted into the queue when the corresponding event occurs, but rather are generated by Get­Message or Peek­Message when they detect that they are about to conclude that there is no message to return and the generated-on-...

    Comments are closed.0Code
    How do I get a window back on the screen when it moved far, far away? Windows 7 (and 8) edition
    How do I get a window back on the screen when it moved far, far away? Windows 7 (and 8) edition
    May 22, 2013 May 22, 2013 05/22/13
    Raymond Chen
    Some time ago, I showed how to get a window back on the screen when it moved far, far away. That technique still works in Windows 7 and 8, but there's an easier shortcut that takes advantage of window arrangement features added in Windows 7. First, you switch to the application by whatever means. Then hit Win+UpArrow to ...

    Comments are closed.0Tips/Support
    A question about proper disposal of unwanted items with an unhelpful answer
    A question about proper disposal of unwanted items with an unhelpful answer
    May 21, 2013 May 21, 2013 05/21/13
    Raymond Chen
    On an internal mailing list about home maintenance and ownership, somebody asked: I have a handful of items that I need to get rid of and probably should not toss into the regular garbage. Any thoughts? The best reply was an unhelpful one. You've pretty much got all the components you need to build a bomb. Why dispose of them...

    Comments are closed.0Non-Computer
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