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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 Overrides Function HookProc ( _
	hwnd As IntPtr, _
	msg As Integer, _
	wParam As IntPtr, _
	lParam As IntPtr _
) As IntPtr


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.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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