DefaultDllImportSearchPathsAttribute Class

Definition

Specifies the paths that are used to search for DLLs that provide functions for platform invokes.

public ref class DefaultDllImportSearchPathsAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Method, AllowMultiple=false)]
[System.Runtime.InteropServices.ComVisible(false)]
public sealed class DefaultDllImportSearchPathsAttribute : Attribute
type DefaultDllImportSearchPathsAttribute = class
    inherit Attribute
Public NotInheritable Class DefaultDllImportSearchPathsAttribute
Inherits Attribute
Inheritance
DefaultDllImportSearchPathsAttribute
Attributes

Remarks

When applied to an assembly, this attribute specifies the paths that are used by default to search for any DLL that provides a function for a platform invoke, in any code in the assembly. When applied to an individual platform invoke, this attribute overrides the default search paths that were specified for the assembly.

This attribute is ignored for any platform invoke that specifies an absolute path.

Use this attribute to prevent the Win32 LoadLibraryEx function from searching the current working directory. This helps protect your application from attacks in which malicious software places a DLL in the current working directory, so that when a platform invoke calls the Win32 LoadLibraryEx function, the function's default search order finds the malicious DLL instead of the system DLL it was intended to find.

The common language runtime handles the call to the LoadLibraryEx function according to the following algorithm:

  1. If the attribute is applied to an individual platform invoke, use the values specified by that instance of the attribute.

  2. Otherwise, if the attribute is applied to the assembly that contains the platform invoke, use the values specified by that instance of the attribute.

  3. Otherwise, search the assembly directory and then call the LoadLibraryEx function with the LOAD_WITH_ALTERED_SEARCH_PATH flag.

Constructors

DefaultDllImportSearchPathsAttribute(DllImportSearchPath)

Initializes a new instance of the DefaultDllImportSearchPathsAttribute class, specifying the paths to use when searching for the targets of platform invokes.

Properties

Paths

Gets a bitwise combination of enumeration values that specify the paths that the LoadLibraryEx function searches during platform invokes.

TypeId

When implemented in a derived class, gets a unique identifier for this Attribute.

(Inherited from Attribute)

Methods

Equals(Object)

Returns a value that indicates whether this instance is equal to a specified object.

(Inherited from Attribute)
GetHashCode()

Returns the hash code for this instance.

(Inherited from Attribute)
GetType()

Gets the Type of the current instance.

(Inherited from Object)
IsDefaultAttribute()

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(Inherited from Attribute)
Match(Object)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(Inherited from Attribute)
MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

Returns a string that represents the current object.

(Inherited from Object)

Explicit Interface Implementations

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.

(Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.

(Inherited from Attribute)
_Attribute.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.

(Inherited from Attribute)

Applies to

See also