Marshal.SecureStringToBSTR Method

Allocates a BSTR and copies the contents of a managed SecureString object into it.

Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)

public static IntPtr SecureStringToBSTR (
	SecureString s
)
public static IntPtr SecureStringToBSTR (
	SecureString s
)
public static function SecureStringToBSTR (
	s : SecureString
) : IntPtr
Not applicable.

Parameters

s

The managed SecureString object to be copied.

Return Value

The address, in unmanaged memory, where the s parameter was copied to, or 0 if a null SecureString object was supplied.

Exception typeCondition

ArgumentNullException

The s parameter is a null reference (Nothing in Visual Basic).

NotSupportedException

The current computer is not running Microsoft Windows 2000 Service Pack 3 or later.

OutOfMemoryException

There is insufficient memory available.

The SecureStringToBSTR method is useful for custom marshaling or when mixing managed and unmanaged code. Because this method allocates the unmanaged memory required for a string, always free the BSTR when finished by calling the ZeroFreeBSTR method.

NoteNote:

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.

Notes to Callers: This method is supported only on computers running Microsoft Windows 2000 Service Pack 3 or later.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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