LCIDConversionAttribute Class
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LCIDConversionAttribute Class


Indicates that a method's unmanaged signature expects a locale identifier (LCID) parameter.

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


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


Initializes a new instance of the LCIDConversionAttribute class with the position of the LCID in the unmanaged signature.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


Gets the position of the LCID argument in the unmanaged signature.


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

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

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_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.)


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

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

You can apply this attribute to methods.

This attribute indicates that the marshaler should expect an LCID to be passed after the designated method argument. When calls are made from managed to unmanaged code, the marshaler supplies the LCID argument automatically.

Legacy Code Example

The following example demonstrates different signature translations based on different values supplied to LCIDConversionAttribute.

using System;
using System.Runtime.InteropServices;
using System.Reflection;

class LCIDAttrSample
	private const int LCID_INSTALLED = 1;
	private const int LCID_SUPPORTED = 2;

	[DllImport("KERNEL32.DLL", EntryPoint="IsValidLocale", SetLastError = true, CharSet = CharSet.Auto)]
	[LCIDConversionAttribute(0)] // Position of the LCID argument
	public static extern bool IsValidLocale(
												uint dwFlags            // options

	public void CheckCurrentLCID()
		MethodInfo mthIfo = this.GetType().GetMethod("IsValidLocale");
		Attribute attr = Attribute.GetCustomAttribute(mthIfo,typeof(LCIDConversionAttribute));

		if( attr != null)
			LCIDConversionAttribute lcidAttr = (LCIDConversionAttribute)attr;
			Console.WriteLine("Position of the LCID argument in the unmanaged signature: " + lcidAttr.Value.ToString());

		bool res = IsValidLocale(LCID_INSTALLED);
		Console.WriteLine("Result LCID_INSTALLED " + res.ToString());
		res = IsValidLocale(LCID_SUPPORTED);
		Console.WriteLine("Result LCID_SUPPORTED " + res.ToString());

	static void Main(string[] args)
		LCIDAttrSample smpl = new LCIDAttrSample();

.NET Framework
Available since 1.1

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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