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August 30, 2013Aug 30, 201308/30/13We saw some time ago that
the x64 calling convention in Windows
reserves space for the register parameters on the stack,
in case the called function wants to spill them.
But can the called function use the memory for other purposes,
August 29, 2013Aug 29, 201308/29/13A customer wanted to know how to detect that the user has opened Notepad to view a particular file. They had come up with method based on polling and sniffing the Notepad title bar, but they found that it consumed a lot of CPU.
August 28, 2013Aug 28, 201308/28/13Continuing the highly-sporadic series of Win32 resource formats, today we’ll look at the format of RT_DATA resources, which are declared in resource files as RCDATA. Also the format of custom resources, which are declared in resource files by just giving the custom resource name or ordinal as the second word on the declaration.
August 27, 2013Aug 27, 201308/27/13When troubleshooting a problem, you may discover that a file is being modified that shouldn’t, and you figure out would be nice if there were some way of finding out which process is modifying the file (so you can get it to stop).
August 26, 2013Aug 26, 201308/26/13I dreamed that one of my friends signed me up for some sort of combination Punk’d/Thank God You’re Here improv show without my knowledge, and I had to explain how her husband had unwittingly coined some nonspecific Internet meme.
August 26, 2013Aug 26, 201308/26/13The Mouse control panel has a setting called
Automatically move pointer to the default button in a dialog box,
known informally as Snap to default button
or simply Snap To.
You may have discovered that it doesn’t work for all dialog boxes.
August 23, 2013Aug 23, 201308/23/13There are two ways of calling
the
CreateIOCompletionPort function.
You can pass a null pointer as the
ExistingCompletionPort parameter,
indicating that you would like to create a brand new completion port,
associated with the file handle you passed (if you passed one).
August 22, 2013Aug 22, 201308/22/13File handles are synchronous by default. If you want asynchronous file handles, you need to pass the FILE_FLAG_OVERLAPPED flag when you create the handle. And all operations on a synchronous file handle are serialized.
You’d think this was a simple and obvious rule,
August 21, 2013Aug 21, 201308/21/13A customer wanted to know how to enable a confirmation dialog whenever the user inadvertently perform a drag/drop operation in Explorer to move files within a volume.
For example, if I have an S drive mapped to \\server\share, I would like to display the confirmation dialog when users inadvertently drag and drop a file or folder within the S drive.
August 20, 2013Aug 20, 201308/20/13Work on Windows occurs in several different branches of the source code, and changes in one branch propagate to other branches. The goal is to push changes toward the trunk on a regular cadence. I will illustrate with an extremely simplified example because the complexities aren’t really important.
