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DispatcherHooks.OperationStarted Event

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Definition

Namespace:
System.Windows.Threading
Assembly:
WindowsBase.dll

Occurs when an operation is invoked.

public:
 event System::Windows::Threading::DispatcherHookEventHandler ^ OperationStarted;
[add: System.Security.SecurityCritical]
[remove: System.Security.SecurityCritical]
public event System.Windows.Threading.DispatcherHookEventHandler OperationStarted;
public event System.Windows.Threading.DispatcherHookEventHandler OperationStarted;
[<add: System.Security.SecurityCritical>]
[<remove: System.Security.SecurityCritical>]
member this.OperationStarted : System.Windows.Threading.DispatcherHookEventHandler 
member this.OperationStarted : System.Windows.Threading.DispatcherHookEventHandler 
Public Custom Event OperationStarted As DispatcherHookEventHandler

Event Type

DispatcherHookEventHandler
Attributes
SecurityCriticalAttribute

Remarks

Typically, this event is due to the BeginInvoke API, but the Invoke API can also cause this event if any priority other than DispatcherPriority.Send is specified, or if the destination dispatcher is owned by a different thread.

Any thread can post operations, so this event can be raised by any thread.

Applies to