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Marshal.GetFunctionPointerForDelegate Method

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

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

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


The d parameter is a generic type


The d parameter is null.

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.


Generics are not supported in interop scenarios.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, 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.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0