Marshal Methods


.NET Framework Class Library
Marshal..::.GetFunctionPointerForDelegate Method

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)
C# 
[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
)
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
ExceptionCondition
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.

NoteNote:

Generics are not supported in interop scenarios.
.NET Framework Security
Platforms

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.
Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0
See Also

Reference

Marshal Class
Marshal Members
System.Runtime.InteropServices Namespace
Tags :


Page view tracker