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Marshal.GetComInterfaceForObjectInContext Method

Returns an interface pointer that represents the specified interface for an object, if the caller is in the same context as that object.

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

public static IntPtr GetComInterfaceForObjectInContext(
	Object o,
	Type t


Type: System.Object

The object that provides the interface.

Type: System.Type

The type of interface that is requested.

Return Value

Type: System.IntPtr
The interface pointer specified by t that represents the interface for the specified object, or null if the caller is not in the same context as the object.


t is not an interface.


The type is not visible to COM.


o does not support the requested interface.


o is null.


t is null.

This method is the same as GetComInterfaceForObject except that it returns null if the caller is not in the same context as the object. It is particularly useful if you have an unmanaged method that expects to be passed an interface pointer.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

  • SecurityCriticalAttribute 

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

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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