LCIDConversionAttribute Class
Indicates that a method's unmanaged signature expects a locale identifier (LCID) parameter.
For a list of all members of this type, see LCIDConversionAttribute Members.
System.Object
System.Attribute
System.Runtime.InteropServices.LCIDConversionAttribute
[Visual Basic] <AttributeUsage(AttributeTargets.Method)> NotInheritable Public Class LCIDConversionAttribute Inherits Attribute [C#] [AttributeUsage(AttributeTargets.Method)] public sealed class LCIDConversionAttribute : Attribute [C++] [AttributeUsage(AttributeTargets::Method)] public __gc __sealed class LCIDConversionAttribute : public Attribute [JScript] public AttributeUsage(AttributeTargets.Method) class LCIDConversionAttribute extends Attribute
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.
Remarks
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.
Example
[Visual Basic, C#, C++] The following example demonstrates different signature translations based on different values supplied to LCIDConversionAttribute.
[Visual Basic] Imports System Imports System.Runtime.InteropServices Imports System.Reflection Class LCIDAttrSampler Const LCID_INSTALLED As Integer = 1 Const LCID_SUPPORTED As Integer = 2 <DllImport("KERNEL32.DLL", EntryPoint:="IsValidLocale", _ SetLastError:=True, CharSet:=CharSet.Unicode, _ CallingConvention:=CallingConvention.StdCall), _ LCIDConversionAttribute(0)> _ Public Shared Function IsValidLocale(ByVal dwFlags As Integer) As Boolean End Function Public Sub CheckCurrentLCID() Dim mthIfo As MethodInfo = Me.GetType().GetMethod("IsValidLocale") Dim attr As Attribute = Attribute.GetCustomAttribute(mthIfo, GetType(LCIDConversionAttribute)) If Not(attr Is Nothing) Then Dim lcidAttr As LCIDConversionAttribute = CType(attr, LCIDConversionAttribute) Console.WriteLine("Position of the LCID argument in the unmanaged signature: " + lcidAttr.Value.ToString()) End If Dim res As Boolean = IsValidLocale(LCID_INSTALLED) Console.WriteLine("Result LCID_INSTALLED " + res.ToString()) res = IsValidLocale(LCID_SUPPORTED) Console.WriteLine("Result LCID_SUPPORTED " + res.ToString()) End Sub Public Shared Sub Main() Dim smpl As LCIDAttrSampler = New LCIDAttrSampler() smpl.CheckCurrentLCID() End Sub End Class [C#] 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(); smpl.CheckCurrentLCID(); } } [C++] using namespace System; using namespace System::Runtime::InteropServices; using namespace System::Reflection; #define LCID_INSTALLED 1 #define LCID_SUPPORTED 2 __gc class LCIDAttrSample { public: [DllImport(S"KERNEL32.DLL", EntryPoint=S"IsValidLocale", SetLastError = true, CharSet = CharSet::Auto)] [LCIDConversionAttribute(0)] // Position of the LCID argument static bool IsValidLocale(int dwFlags); // options void CheckCurrentLCID() { MethodInfo* mthIfo = this->GetType()->GetMethod(S"IsValidLocale"); Attribute* attr = Attribute::GetCustomAttribute(mthIfo, __typeof(LCIDConversionAttribute)); if (attr != 0) { LCIDConversionAttribute *lcidAttr = dynamic_cast<LCIDConversionAttribute*>(attr); Console::WriteLine(S"Position of the LCID argument in the unmanaged signature: {0}",__box( lcidAttr->Value)); } bool res = IsValidLocale(LCID_INSTALLED); Console::WriteLine(S"Result LCID_INSTALLED {0}",__box( res)); res = IsValidLocale(LCID_SUPPORTED); Console::WriteLine(S"Result LCID_SUPPORTED {0}",__box( res)); } }; int main() { LCIDAttrSample *smpl = new LCIDAttrSample(); smpl->CheckCurrentLCID(); };
[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button
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Requirements
Namespace: System.Runtime.InteropServices
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
Assembly: Mscorlib (in Mscorlib.dll)
See Also
LCIDConversionAttribute Members | System.Runtime.InteropServices Namespace