GetIDispatchForObject Method
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Marshal.GetIDispatchForObject Method (Object)


Returns an IDispatch interface from a managed object.

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

public static IntPtr GetIDispatchForObject(
	object o


Type: System.Object

The object whose IDispatch interface is requested.

Return Value

Type: System.IntPtr

The IDispatch pointer for the o parameter.

Exception Condition

o does not support the requested interface.

In managed code, you seldom work directly with the IDispatch interface. However, GetIDispatchForObject is useful when calling a method that exposes a COM object parameter as an IntPtr type, or with custom marshaling. Calling an object with this method causes the reference count to increment on the interface pointer before the pointer is returned. Always use Marshal.Release to decrement the reference count once you have finished with the pointer.

You can also use this method on a managed object to obtain an interface pointer to the COM callable wrapper for the object. For additional information, see COM Callable Wrapper.


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

.NET Framework
Available since 1.1
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