Nostalgia .Net • WinEvent

Component for tracking low-level system-wide events

"The Microsoft Windows operating system includes a feature, called WinEvents, that enables processes and applications running on the Windows desktop to exchange certain types of information. Accessibility tools that use Microsoft UI Automation and Microsoft Active Accessibility are among the primary users of the WinEvents.

In the context of accessibility, UI Automation providers and Microsoft Active Accessibility servers use WinEvents to notify clients of changes in an application UI, such as when a UI element has been created or destroyed, or when an element name, state, or value has changed."

WinEvent is very powerful, but unappreciated, so, for instance, we can found using of the system-wide hook for tracking the mouse position, but there is no examples of WinEvent using for the same purpose. WinEvent can, for example, track the mouse cursor changes throughout the system, report changing of size and position of any window in the system, track switching active windows and much more. Of course, native Win32 way is not most simple and convenient, but Nostalgia .Net has special WinEvent component that allows to have all the power of WinEvent and to have no problems with coding at the same time.

WinEvent components offers many specialized events:

SystemAlert	Occurs for system alert events.
WindowForeground	Occurs when foreground window is changed.
MenuStart	Occurs when menu is started.
MenuEnd	Occurs when menu is closed.
MenuPopupStart	Occurs when popup menu is started.
MenuPopupEnd	Occurs when popup menu is closed.
CaptureStart	Occurs when mouse is captured.
CaptureEnd	Occurs when mouse capture was released.
MoveSizeStart	Occurs when window is being moved or resized.
MoveSizeEnd	Occurs when the movement or resizing of a window has finished.
ContextHelpStart	Occurs when window has entered context-sensitive Help mode.
ContextHelpEnd	Occurs when window has exited context-sensitive Help mode.
ScrollingStart	Occurs when scrolling has started on a scroll bar.
ScrollingEnd	Occurs when scrolling has ended on a scroll bar.
SwitchStart	Occurs when the user has pressed ALT+TAB, which activates the switch window.
SwitchEnd	Occurs when the user has released ALT+TAB.
MinimizeStart	Occurs when a window object is about to be minimized.
MinimizeEnd	Occurs when a window object has been minimized.
ObjectCreate	Occurs when object has been created.
ObjectDestroy	Occurs when object has been destroyed.
ObjectShow	Occurs when hidden object is shown.
ObjectHide	Occurs when object is hidden.
ObjectReorder	Occurs when container object has added, removed, or reordered its children.
ObjectFocus	Occurs when object has received the keyboard focus.
ObjectSelection	Occurs when selection within a container object has changed.
ObjectSelectionAdd	Occurs when child within a container object has been added to an existing selection.
ObjectSelectionRemove	Occurs when item within a container object has been removed from the selection.
ObjectSelectionWithin	Occurs when numerous selection changes have occurred within a container object.
ObjectStateChanged	Occurs when object's state has changed.
ObjectLocationChanged	Occurs when object has changed location, shape, or size.
ObjectNameChanged	Occurs when object's Name property has changed.
ObjectValueChanged	Occurs when object's Value property has changed.
WinEventHook	Occurs for each WinEvent event.

In addition to events Nostalgia .Net declares special enum types for using instead of Win32's constants in event handlers, so you don't need to use numeric constants even in handler of raw WinEventHook event.

Just activate component at runtime from your code and enjoy:

    winEvent.Active = true;

Some of WinEvent component's features are demonstrated in special demo project (click to see full-size image):

As you can see in the demo source codes, you need only several lines of native C# code to access all the power of WinEvent.

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