CallingConventions Enumeration

Defines the valid calling conventions for an enumeration.

This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)

'Declaration
<SerializableAttribute> _
<FlagsAttribute> _
<ComVisibleAttribute(True)> _
Public Enumeration CallingConventions
'Usage
Dim instance As CallingConventions

/** @attribute SerializableAttribute() */ 
/** @attribute FlagsAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public enum CallingConventions
SerializableAttribute 
FlagsAttribute 
ComVisibleAttribute(true) 
public enum CallingConventions

 Member nameDescription
Supported by the .NET Compact FrameworkAnySpecifies that either the Standard or the VarArgs calling convention may be used. 
Supported by the .NET Compact FrameworkExplicitThisSpecifies that the signature is a function-pointer signature, representing a call to an instance or virtual method (not a static method). If ExplicitThis is set, HasThis must also be set. The first argument passed to the called method is still a this pointer, but the type of the first argument is now unknown. Therefore, a token that describes the type (or class) of the this pointer is explicitly stored into its metadata signature. 
Supported by the .NET Compact FrameworkHasThisSpecifies an instance or virtual method (not a static method). At run-time, the called method is passed a pointer to the target object as its first argument (the this pointer). The signature stored in metadata does not include the type of this first argument, because the method is known and its owner class can be discovered from metadata. 
Supported by the .NET Compact FrameworkStandardSpecifies the default calling convention as determined by the common language runtime. Use this calling convention for static methods. For instance or virtual methods use HasThis
Supported by the .NET Compact FrameworkVarArgsSpecifies the calling convention for methods with variable arguments. 

The native calling convention is the set of rules governing the order and layout of arguments passed to compiled methods. It also governs how to pass the return value, what registers to use for arguments, and whether the called or the calling method removes arguments from the stack.

Public Class MyClass1
    Public Sub New(ByVal i As Integer)
    End Sub
    Public Shared Sub Main()
        Try
            Dim myType As Type = GetType(MyClass1)
            Dim types(0) As Type
            types(0) = GetType(Integer)
            ' Get the public instance constructor that takes an integer parameter.
            Dim constructorInfoObj As ConstructorInfo = _
                        myType.GetConstructor(BindingFlags.Instance Or _
                        BindingFlags.Public, Nothing, _
                        CallingConventions.HasThis, types, Nothing)
            If Not (constructorInfoObj Is Nothing) Then
                Console.WriteLine("The constructor of MyClass1 that " + _
                                  "is a public instance method and takes an " + _
                                  "integer as a parameter is: ")
                Console.WriteLine(constructorInfoObj.ToString())
            Else
                Console.WriteLine("The constructor MyClass1 that " + _
                                  "is a public instance method and takes an " + _
                                  "integer as a parameter is not available.")
            End If
        Catch e As ArgumentNullException
            Console.WriteLine("ArgumentNullException: " + e.Message)
        Catch e As ArgumentException
            Console.WriteLine("ArgumentException: " + e.Message)
        Catch e As SecurityException
            Console.WriteLine("SecurityException: " + e.Message)
        Catch e As Exception
            Console.WriteLine("Exception: " + e.Message)
        End Try
    End Sub
End Class

import System.*;
import System.Reflection.*;
import System.Security.*;

public class MyClass1
{
    public MyClass1(int i)
    {
    } //MyClass1

    public static void main(String[] args)
    {
        try {
            Type myType = MyClass1.class.ToType();
            Type types[] = new Type[1];
            types.set_Item(0, int.class.ToType());
            // Get the public instance constructor that takes an
            // integer parameter.
            ConstructorInfo constructorInfoObj =
                myType.GetConstructor(BindingFlags.Instance|BindingFlags.Public,
                null, CallingConventions.HasThis, types, null);
            if (constructorInfoObj != null) {
                Console.WriteLine("The constructor of MyClass1 that is a public "
                    + "instance method and takes an integer as a parameter is: ");
                Console.WriteLine(constructorInfoObj.ToString());
            }
            else {
                Console.WriteLine("The constructor of MyClass1 that is a "
                    + "public instance method and takes an integer "
                    + "as a parameter is not available.");
            }
        }
        catch (ArgumentNullException e) {
            Console.WriteLine("ArgumentNullException: " + e.get_Message());
        }
        catch (ArgumentException e) {
            Console.WriteLine("ArgumentException: " + e.get_Message());
        }
        catch (SecurityException e) {
            Console.WriteLine("SecurityException: " + e.get_Message());
        }
        catch (System.Exception e) {
            Console.WriteLine("Exception: " + e.get_Message());
        }
    } //main
} //MyClass1

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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