RealProxy.GetCOMIUnknown(Boolean) Method
Definition
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.
Requests an unmanaged reference to the object represented by the current proxy instance.
public:
virtual IntPtr GetCOMIUnknown(bool fIsMarshalled);
public virtual IntPtr GetCOMIUnknown (bool fIsMarshalled);
[System.Security.SecurityCritical]
public virtual IntPtr GetCOMIUnknown (bool fIsMarshalled);
abstract member GetCOMIUnknown : bool -> nativeint
override this.GetCOMIUnknown : bool -> nativeint
[<System.Security.SecurityCritical>]
abstract member GetCOMIUnknown : bool -> nativeint
override this.GetCOMIUnknown : bool -> nativeint
Public Overridable Function GetCOMIUnknown (fIsMarshalled As Boolean) As IntPtr
Parameters
- fIsMarshalled
- Boolean
true
if the object reference is requested for marshaling to a remote location; false
if the object reference is requested for communication with unmanaged objects in the current process through COM.
Returns
nativeint
A pointer to a COM Callable Wrapper if the object reference is requested for communication with unmanaged objects in the current process through COM, or a pointer to a cached or newly generated IUnknown
COM interface if the object reference is requested for marshaling to a remote location.
- Attributes
Examples
[SecurityPermission(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::Infrastructure)]
IntPtr SupportsInterface( Guid * /*myGuid*/ )
{
Console::WriteLine( "SupportsInterface method called" );
// Object reference is requested for communication with unmanaged objects
// in the current process through COM.
IntPtr myIntPtr = this->GetCOMIUnknown( false );
// Stores an unmanaged proxy of the object.
this->SetCOMIUnknown( myIntPtr );
// return COM Runtime Wrapper pointer.
return myIntPtr;
}
public override IntPtr SupportsInterface(ref Guid myGuid)
{
Console.WriteLine("SupportsInterface method called");
// Object reference is requested for communication with unmanaged objects
// in the current process through COM.
IntPtr myIntPtr = this.GetCOMIUnknown(false);
// Stores an unmanaged proxy of the object.
this.SetCOMIUnknown(myIntPtr);
// return COM Runtime Wrapper pointer.
return myIntPtr;
}
<SecurityPermission(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.Infrastructure)> _
Public Overrides Function SupportsInterface(ByRef myGuid As Guid) As IntPtr
Console.WriteLine("SupportsInterface method called")
' Object reference is requested for communication with unmanaged objects
' in the current process through COM.
Dim myIntPtr As IntPtr = Me.GetCOMIUnknown(False)
' Stores an unmanaged proxy of the object.
Me.SetCOMIUnknown(myIntPtr)
' return COM Runtime Wrapper pointer.
Return myIntPtr
End Function 'SupportsInterface
Remarks
If the proxy is requested for marshaling, then an IUnknown
interface for the object represented by the current proxy instance is returned. If an IUnknown
was previously cached by the SetCOMIUnknown method, then that instance is returned; otherwise, a new instance is returned.
If the proxy is requested not for marshaling but for communication with unmanaged objects in the current process, then a COM Callable Wrapper (CCW), which can be used in the current process for communication through COM, is returned.
Applies to
คำติชม
https://aka.ms/ContentUserFeedback
เร็วๆ นี้: ตลอดปี 2024 เราจะขจัดปัญหา GitHub เพื่อเป็นกลไกคำติชมสำหรับเนื้อหา และแทนที่ด้วยระบบคำติชมใหม่ สำหรับข้อมูลเพิ่มเติม ให้ดู:ส่งและดูข้อคิดเห็นสำหรับ