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HwndSource.AddHook Method

Adds an event handler that receives all window messages.

Namespace: System.Windows.Interop
Assembly: PresentationCore (in presentationcore.dll)

public void AddHook (
	HwndSourceHook hook
)
public void AddHook (
	HwndSourceHook hook
)
public function AddHook (
	hook : HwndSourceHook
)
You cannot use methods in XAML.

Parameters

hook

The handler implementation (based on the HwndSourceHook delegate) that receives the window messages.

Security noteSecurity Note:

This method is not available in the Internet security zone.

Most Win32 messages that reach the HwndSource have an approximate WPF equivalent. You use AddHook to handle the cases where the message has no WPF equivalent.

The HwndSourceHook delegate resembles the parameter profile of a Win32 main window procedure. All window messages that the main window procedure of the HwndSource parent window receives are also forwarded to the HwndSourceHook delegates.

Hooks are called in the order that they were added. If any hook returns handled=true for a message, the hooks after it in the call order are not called for that message.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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