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Marshal::SecureStringToGlobalAllocAnsi Method

Copies the contents of a managed SecureString into unmanaged memory, converting into ANSI format as it copies.

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

public:
static IntPtr SecureStringToGlobalAllocAnsi(
	SecureString^ s
)

Parameters

s
Type: System.Security::SecureString

The managed object to copy.

Return Value

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

ExceptionCondition
ArgumentNullException

The s parameter is nullptr.

NotSupportedException

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

OutOfMemoryException

There is insufficient memory available.

The SecureStringToGlobalAllocAnsi 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 memory by calling the ZeroFreeGlobalAllocAnsi method.

Notes to Callers

This method is supported only on computers running Windows 2000 Service Pack 3 or later.

The following example uses the SecureStringToGlobalAllocAnsi method to marshal and decrypt the contents of a SecureString object to a block of unmanaged memory. It then uses the ZeroFreeGlobalAllocAnsi method to zero out and dispose the unmanaged block.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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