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Marshal.ChangeWrapperHandleStrength Method

Changes the strength of a COM callable wrapper's (CCW) handle on the object it contains.

[Visual Basic]
Public Shared Sub ChangeWrapperHandleStrength( _
   ByVal otp As Object, _
   ByVal fIsWeak As Boolean _
public static void ChangeWrapperHandleStrength(
 object otp,
 bool fIsWeak
public: static void ChangeWrapperHandleStrength(
 Object* otp,
 bool fIsWeak
public static function ChangeWrapperHandleStrength(
   otp : Object,
 fIsWeak : Boolean


The object whose COM callable wrapper (CCW) holds a reference counted handle. The handle is strong if the reference count on the CCW is greater than zero; otherwise it is weak.
true to change the strength of the handle on the otp parameter to weak, regardless of its reference count; false to reset the handle strength on otp to be reference counted.


ChangeWrapperHandleStrength is used for object pooling functionality and should never be called by user code directly.

Note   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.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

Marshal Class | Marshal Members | System.Runtime.InteropServices Namespace