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GCHandle::FromIntPtr Method

Returns a new GCHandle object created from a handle to a managed object.

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

[SecurityPermissionAttribute(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::UnmanagedCode)]
public:
static GCHandle FromIntPtr(
	IntPtr value
)

Parameters

value
Type: System::IntPtr

An IntPtr handle to a managed object to create a GCHandle object from.

Return Value

Type: System.Runtime.InteropServices::GCHandle
A new GCHandle object that corresponds to the value parameter.

ExceptionCondition
InvalidOperationException

The value of the value parameter is Zero.

The following code example shows an App class that creates a handle to a managed object using the GCHandle.Alloc method, which prevents the managed object from being collected. A call to the EnumWindows method passes a delegate and a managed object (both declared as managed types, but not shown), and casts the handle to an IntPtr object. The unmanaged function passes the type back to the caller as a parameter of the callback function.

No code example is currently available or this language may not be supported.

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

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

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