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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)

abstract HookProc : 
        hwnd:IntPtr * 
        msg:int * 
        wParam:IntPtr * 
        lParam:IntPtr -> IntPtr  
override HookProc : 
        hwnd:IntPtr * 
        msg:int * 
        wParam:IntPtr * 
        lParam:IntPtr -> IntPtr

Parameters

hwnd
Type: System.IntPtr

Window handle for the Win32 dialog.

msg
Type: System.Int32

Message to be processed by the Win32 dialog.

wParam
Type: System.IntPtr

Parameters for dialog actions.

lParam
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: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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