Marshal.GetUniqueObjectForIUnknown(IntPtr) Method

Reference

Definition

Namespace:: System.Runtime.InteropServices

Assemblies:: mscorlib.dll, System.Runtime.InteropServices.dll

Assemblies:: netstandard.dll, System.Runtime.InteropServices.dll

Assembly:: System.Runtime.InteropServices.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Marshal.NoCom.cs

Source:: Marshal.NoCom.cs

Source:: Marshal.NoCom.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Creates a unique Runtime Callable Wrapper (RCW) object for a given IUnknown interface.

public:
 static System::Object ^ GetUniqueObjectForIUnknown(IntPtr unknown);

[System.Security.SecurityCritical]
public static object GetUniqueObjectForIUnknown(IntPtr unknown);

[System.Runtime.Versioning.SupportedOSPlatform("windows")]
public static object GetUniqueObjectForIUnknown(IntPtr unknown);

public static object GetUniqueObjectForIUnknown(IntPtr unknown);

[<System.Security.SecurityCritical>]
static member GetUniqueObjectForIUnknown : nativeint -> obj

[<System.Runtime.Versioning.SupportedOSPlatform("windows")>]
static member GetUniqueObjectForIUnknown : nativeint -> obj

static member GetUniqueObjectForIUnknown : nativeint -> obj

Public Shared Function GetUniqueObjectForIUnknown (unknown As IntPtr) As Object

Parameters

unknown: IntPtr

A managed pointer to an IUnknown interface.

Returns

Object

A unique RCW for the specified IUnknown interface.

Attributes: SecurityCriticalAttribute SupportedOSPlatformAttribute

Remarks

The GetUniqueObjectForIUnknown method ensures that you receive a unique RCW, because it does not match an IUnknown pointer to an existing object. Use this method when you have to create a unique RCW that is not impacted by other code that calls the ReleaseComObject method.

Applies to

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

Share via