Windows Dev Center

DllImportAttribute Class

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.


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

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

The DllImportAttribute type exposes the following members.

Public methodDllImportAttributeInitializes a new instance of the DllImportAttribute class with the name of the DLL containing the method to import.

Public propertyValueInfrastructure. Gets the name of the DLL file that contains the entry point.

Public methodEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

Public fieldBestFitMappingEnables or disables best-fit mapping behavior when converting Unicode characters to ANSI characters.
Public fieldCallingConventionIndicates the calling convention of an entry point.
Public fieldCharSetIndicates how to marshal string parameters to the method and controls name mangling.
Public fieldEntryPointIndicates the name or ordinal of the DLL entry point to be called.
Public fieldExactSpellingControls whether the DllImportAttribute.CharSet field causes the common language runtime to search an unmanaged DLL for entry-point names other than the one specified.
Public fieldPreserveSigIndicates 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.
Public fieldSetLastErrorIndicates whether the callee calls the SetLastError Win32 API function before returning from the attributed method.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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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