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BStrWrapper Class

.NET Framework 4

Marshals data of type VT_BSTR from managed to unmanaged code. This class cannot be inherited.

System.Object
  System.Runtime.InteropServices.BStrWrapper

Namespace:  System.Runtime.InteropServices
Assembly:  mscorlib (in mscorlib.dll)
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[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class BStrWrapper

The BStrWrapper type exposes the following members.

  Name Description
Public method BStrWrapper(Object) Initializes a new instance of the BStrWrapper class with the specified Object object.
Public method BStrWrapper(String) Initializes a new instance of the BStrWrapper class with the specified String object.
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  Name Description
Public property WrappedObject Gets the wrapped String object to marshal as type VT_BSTR.
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  Name Description
Public method Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ToString Returns a string that represents the current object. (Inherited from Object.)
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The BStrWrapper class controls how the wrapped object is marshaled when passed as VARIANT. You can wrap a String object in a BStrWrapper object to marshal it as VT_BSTR. BStrWrapper is useful when passing a null string to unmanaged code. Without BStrWrapper, a null string is passed as VT_EMPTY; however, wrapping the string with BStrWrapper ensures that the null string is passed as VT_BSTR.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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