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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
)
public static IntPtr GetComInterfaceForObjectInContext (
	Object o, 
	Type t
)
public static function GetComInterfaceForObjectInContext (
	o : Object, 
	t : Type
) : IntPtr
Not applicable.

Parameters

o

The object that provides the interface.

t

The Type of interface that is requested.

Return Value

The interface pointer specified by t that represents the interface for the specified object, or a null reference (Nothing in Visual Basic) if the caller is not in the same context as the object.

Exception typeCondition

ArgumentException

t is not an interface.

-or-

The type is not visible to COM.

InvalidCastException

o does not support the requested interface.

ArgumentNullException

o is a null reference (Nothing in Visual Basic).

-or-

t is a null reference (Nothing in Visual Basic).

This method is the same as GetComInterfaceForObject except that it returns a null reference (Nothing in Visual Basic) 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.

NoteNote:

This method uses SecurityAction.LinkDemand to prevent it from being called from untrusted code; only the immediate caller is required to have SecurityPermissionAttribute.UnmanagedCode permission. If your code can be called from partially trusted code, do not pass user input to Marshal class methods without validation. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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