This documentation is archived and is not being maintained.

FileDialog.HookProc Method

Defines the common file dialog hook procedure that is overridden to add common functionality to a file dialog.

Namespace:  Microsoft.Win32
Assembly:  PresentationFramework (in PresentationFramework.dll)

protected override IntPtr HookProc(
	IntPtr hwnd,
	int msg,
	IntPtr wParam,
	IntPtr lParam
You cannot use methods in XAML.


Type: System.IntPtr

Window handle for the Win32 dialog.

Type: System.Int32

Message to be processed by the Win32 dialog.

Type: System.IntPtr

Parameters for dialog actions.

Type: System.IntPtr

Parameters for dialog actions.

Return Value

Type: System.IntPtr
Returns Zero to indicate success; otherwise, a non-zero value is returned to indicate failure.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0