IDispatchImplAttribute Class
Indicates which IDispatch implementation the common language runtime uses when exposing dual interfaces and dispinterfaces to COM.
Assembly: mscorlib (in mscorlib.dll)
| Name | Description | |
|---|---|---|
![]() | IDispatchImplAttribute(IDispatchImplType) | Initializes a new instance of the IDispatchImplAttribute class with specified IDispatchImplType value. |
![]() | IDispatchImplAttribute(Int16) | Initializes a new instance of the IDispatchImplAttribute class with specified IDispatchImplType value. |
| Name | Description | |
|---|---|---|
![]() | TypeId | |
![]() | Value | Gets the IDispatchImplType value used by the class. |
| Name | Description | |
|---|---|---|
![]() | Equals(Object^) | This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.) |
![]() | GetHashCode() | Returns the hash code for this instance.(Inherited from Attribute.) |
![]() | GetType() | |
![]() | IsDefaultAttribute() | When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.) |
![]() | Match(Object^) | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.) |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
| Name | Description | |
|---|---|---|
![]() ![]() | _Attribute::GetIDsOfNames(Guid%, IntPtr, UInt32, UInt32, IntPtr) | Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfo(UInt32, UInt32, IntPtr) | Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfoCount(UInt32%) | Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.) |
![]() ![]() | _Attribute::Invoke(UInt32, Guid%, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) | Provides access to properties and methods exposed by an object.(Inherited from Attribute.) |
You can apply this attribute to classes or assemblies.
This attribute should only be set when an explicit implementation is required. When you set the attribute to CompatibleImpl, the IDispatch implementation is supplied by passing the type information for the object to COM's CreateStdDispatch API. When you set the attribute to InternalImpl, the IDispatch implementation is supplied by the common language runtime. Setting the attribute to SystemDefinedImpl allows the runtime to choose the appropriate implementation. When using the attribute on an assembly, the attribute applies to all classes defined within the assembly. When using the attribute on an individual class, the attribute applies only to the interfaces exposed by that class and overrides any assembly-level setting.
The following example demonstrates how to apply IDispatchImplAttribute to select the IDispatch implementation supplied by the common language runtime.
using namespace System; using namespace System::Runtime::InteropServices; // by default all classes in this assembly will use COM implementaion // // But this class will use runtime implementaion [assembly:IDispatchImpl(IDispatchImplType::CompatibleImpl)]; [IDispatchImpl(IDispatchImplType::InternalImpl)] ref class MyClass{};
Available since 1.1
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.



