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GetFunctionPointerForDelegate Method
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Marshal.GetFunctionPointerForDelegate Method

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

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

public static IntPtr GetFunctionPointerForDelegate(
	Delegate d


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

Return Value

Type: System.IntPtr
A 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.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.

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