Marshal.GetFunctionPointerForDelegate Method (System.Runtime.InteropServices)

GetFunctionPointerForDelegate Metho...

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This page is specific to

Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

Marshal..::.GetFunctionPointerForDelegate Method

Updated: November 2007

Converts a delegate into a function pointer callable from unmanaged code.

Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)

Syntax

Visual Basic (Declaration)

<SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.UnmanagedCode)> _
Public Shared Function GetFunctionPointerForDelegate ( _
    d As Delegate _
) As IntPtr

Visual Basic (Usage)

Dim d As [Delegate]
Dim returnValue As IntPtr

returnValue = Marshal.GetFunctionPointerForDelegate(d)

[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public static IntPtr GetFunctionPointerForDelegate(
    Delegate d
)

Visual C++

[SecurityPermissionAttribute(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::UnmanagedCode)]
public:
static IntPtr GetFunctionPointerForDelegate(
    Delegate^ d
)

/** @attribute SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode) */
public static IntPtr GetFunctionPointerForDelegate(
    Delegate d
)

JScript

public static function GetFunctionPointerForDelegate(
    d : Delegate
) : IntPtr

Parameters

d: Type: System..::.Delegate
The delegate to be passed to unmanaged code.

Return Value

Type: System..::.IntPtr

An System..::.IntPtr value that can be passed to unmanaged code, which in turn can use it to call the underlying managed delegate.

Exceptions

Exception	Condition
ArgumentException	The d parameter is a generic type
ArgumentNullException	The d parameter is nullNothingnullptra null reference (Nothing in Visual Basic).

Remarks

The delegate d is converted to a function pointer that can be passed to unmanaged code using the __stdcall calling convention.

You must manually keep the delegate from being collected by the garbage collector from managed code. The garbage collector does not track reference to unmanaged code.

Note:
Generics are not supported in interop scenarios.

Permissions

SecurityPermission
for permission to call unmanaged code.
Associated enumeration: UnmanagedCode Security action: LinkDemand

Platforms

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

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.

Version Information