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11/18/2011

DllImportAttribute Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Indicates that the attributed method is exposed by an unmanaged dynamic-link library (DLL) as a static entry point.

Inheritance Hierarchy

System.Object
System.Attribute
System.Runtime.InteropServices.DllImportAttribute

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

Syntax

'Declaration
<AttributeUsageAttribute(AttributeTargets.Method, Inherited := False)> _
<ComVisibleAttribute(True)> _
Public NotInheritable Class DllImportAttribute _
    Inherits Attribute

[AttributeUsageAttribute(AttributeTargets.Method, Inherited = false)]
[ComVisibleAttribute(true)]
public sealed class DllImportAttribute : Attribute

The DllImportAttribute type exposes the following members.

Constructors

	Name	Description
	DllImportAttribute	Initializes a new instance of the DllImportAttribute class with the name of the DLL containing the method to import.

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Properties

	Name	Description
	Value	Infrastructure. Gets the name of the DLL file that contains the entry point.

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Methods

	Name	Description
	Equals	Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Returns the hash code for this instance. (Inherited from Attribute.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	Match	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.)

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Fields

	Name	Description
	BestFitMapping	Enables or disables best-fit mapping behavior when converting Unicode characters to ANSI characters.
	CallingConvention	Indicates the calling convention of an entry point.
	CharSet	Indicates how to marshal string parameters to the method and controls name mangling.
	EntryPoint	Indicates the name or ordinal of the DLL entry point to be called.
	ExactSpelling	Controls whether the DllImportAttribute.CharSet field causes the common language runtime to search an unmanaged DLL for entry-point names other than the one specified.
	PreserveSig	Indicates whether unmanaged methods that have HRESULT or retval return values are directly translated or whether HRESULT or retval return values are automatically converted to exceptions.
	SetLastError	Indicates whether the callee calls the SetLastError Win32 API function before returning from the attributed method.

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Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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