internals

So how does console subsystem work ? I understand high level stuff such as windows automatically creates console window for programs and then gives handle to console window to which you can write and read with WriteConsole and ReadConsole, but how does window itself work ? does windows use GDI to draw characters into console ? or some hidden internal functions ? what happens behind the curtains ? This question is too vague to really answer in a detailed fashion but I'll give it a shot. There are at least 3 different implementations of the console in 32-bit Windows: MS-DOS box in Windows 95/98

In the MEMORY_BASIC_INFORMATION structure one finds two PVOID variables, called BaseAddress and AllocationBase respectively. I'm reading a book on Threading and its going over how to get the stackspace left on the stack in quite some detail, however there's something I'm not sure I understand correctly. The BaseAddress in the structure mentioned above, does it point to the highest address in the current thread stack or the lowest address? Since the stack grows downwards, the lowest would be at the top and the highest at the bottom. What exactly is the difference between the AllocationBase and

I am interested in learning windows system internals and how things work. I am inclined towards learning system programming on windows. With that context, I am curious to know few things on how windows clipboard internally functions: What precisely happens when we select some text, image etc and press Ctrl + C ? What precisely happens when we we press Ctrl + V in different application? Where exactly the copied data resides? Does the copied data go into kernel mode memory - that is shared across all processes? How the copied data becomes available to a different process? I want to know the

In SQL Server you can use FLOAT or REAL to store floating point values the storage format of which is cleared defined by the IEEE 754 standard. For fixed point values we can use DECIMAL type (which has a synonym NUMERIC ). However I'm not pretty sure how SQL Server store DECIMAL values internally. For example, if I define a table and insert a row like this: IF OBJECT_ID('dbo.test_number_types') IS NOT NULL DROP TABLE dbo.test_number_types; CREATE TABLE dbo.test_number_types ( id INT IDENTITY(1, 1), c1 NUMERIC(5, 4) ) GO INSERT INTO dbo.test_number_types(c1)VALUES(5.7456); When I use DBCC PAGE

I know how to use categories as a programmer, but I'm curious how they are implemented. Does the compiler compile them into calls to class_replaceMethod from a static initializer? Thanks. New answer on topic. Each class has a list of methods, when doing a method lookup the method list is scanned from beginning to end. If no method is found the superclass' list is scanned, etc. until reaching the root class. Found methods are cached for faster lookup next time. When loading a category onto a class the categories method list is prepended to the existing list, and caches are flushed. Since the

I am trying to customize the behavior of Selenium's click command, (via user-extentions.js), by intercepting calls to doClick(locator). Basically I need to delay click actions whenever our application's "busy indicator" is being displayed. (Now the standard answer for this kind of thing is to insert a waitFor into the script for those situations. Indeed, we currently have zillions of them throughout our scripts. I'm trying to eliminate those.) Detecting the page element is the trivial part. The tricky part is getting the script to actually wait. My promising looking, but failed attempt looks