SafeHandleZeroOrMinusOneIsInvalid Class
Provides a base class for Win32 safe handle implementations in which the value of either 0 or -1 indicates an invalid handle.
Assembly: mscorlib (in mscorlib.dll)
'Declaration <SecurityPermissionAttribute(SecurityAction.LinkDemand, UnmanagedCode := True)> _ <SecurityPermissionAttribute(SecurityAction.InheritanceDemand, UnmanagedCode := True)> _ Public MustInherit Class SafeHandleZeroOrMinusOneIsInvalid _ Inherits SafeHandle 'Usage Dim instance As SafeHandleZeroOrMinusOneIsInvalid
This class derives from the System.Runtime.InteropServices.SafeHandle class. It describes the format of an invalid handle. For example, some handles use -1 as an invalid handle value, while others use 0. Further derivations of this class (for example, file or registry handles) can specialize this further. See the SafeFileHandle class for an example of a class that derives from SafeHandleZeroOrMinusOneIsInvalid.
Use the SafeHandleZeroOrMinusOneIsInvalid class whenever you need to safely wrap an unmanaged resource that does not have an existing managed wrapper.
- SecurityPermission
for permission to call unmanaged code. Demand value: LinkDemand. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
- SecurityPermission
for permission to call unmanaged code. Demand value: InheritanceDemand. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
System.Runtime.ConstrainedExecution.CriticalFinalizerObject
System.Runtime.InteropServices.SafeHandle
Microsoft.Win32.SafeHandles.SafeHandleZeroOrMinusOneIsInvalid
Microsoft.Win32.SafeHandles.SafeFileHandle
Microsoft.Win32.SafeHandles.SafeNCryptHandle
Microsoft.Win32.SafeHandles.SafePipeHandle
Microsoft.Win32.SafeHandles.SafeWaitHandle
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.