Marshal::GetComInterfaceForObjectInContext Method (Object^, Type^)

.NET Framework (current version)

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)

Syntax

C++

public:
[SecurityCriticalAttribute]
static IntPtr GetComInterfaceForObjectInContext(
	Object^ o,
	Type^ t
)

Parameters

o: Type: System::Object^
The object that provides the interface.

t: 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.

Exceptions

Exception	Condition
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 null. -or- 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.