Marshal.StringToBSTR(String) Method

Reference

Definition

Namespace:: System.Runtime.InteropServices

Assembly:: System.Runtime.InteropServices.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.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.

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

public:
 static IntPtr StringToBSTR(System::String ^ s);

[System.Security.SecurityCritical]
public static IntPtr StringToBSTR (string s);

public static IntPtr StringToBSTR (string? s);

public static IntPtr StringToBSTR (string s);

[<System.Security.SecurityCritical>]
static member StringToBSTR : string -> nativeint

static member StringToBSTR : string -> nativeint

Public Shared Function StringToBSTR (s As String) As IntPtr

Parameters

s: String

The managed string to be copied.

Returns

IntPtr

nativeint

An unmanaged pointer to the BSTR, or 0 if s is null.

Attributes: SecurityCriticalAttribute

Exceptions

OutOfMemoryException

There is insufficient memory available.

ArgumentOutOfRangeException

The length for s is out of range.

Remarks

StringToBSTR 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 Marshal.FreeBSTR. This method provides the opposite functionality of Marshal.PtrToStringBSTR.

Applies to

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