Type.GetTypeFromProgID Method (String, String)

 

Gets the type associated with the specified program identifier (progID) from the specified server, returning null if an error is encountered while loading the type.

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

<SecurityCriticalAttribute>
Public Shared Function GetTypeFromProgID (
	progID As String,
	server As String
) As Type

Parameters

progID
Type: System.String

The progID of the type to get.

server
Type: System.String

The server from which to load the type. If the server name is null, this method automatically reverts to the local machine.

Return Value

Type: System.Type

The type associated with the specified program identifier (progID), if progID is a valid entry in the registry and a type is associated with it; otherwise, null.

Exception Condition
ArgumentException

prodID is null.

This method is provided for COM support. Program IDs are not used in Microsoft .NET Framework because they have been superseded by the concept of namespace.

The following example retrieves a type by passing a ProgID and server name. The example then displays the ClassID related to the ProgID, or throws an exception if the ProgID or the server name is invalid.

Imports System
Class MainApp
    Public Shared Sub Main()
        Try
            ' Use ProgID localhost\HKEY_CLASSES_ROOT\DirControl.DirList.1.
            Dim theProgramID As String = "DirControl.DirList.1"
            ' Use Server name localhost.
            Dim theServer As String = "localhost"
            ' Make a call to the method to get the type information for the given ProgID.
            Dim myType As Type = Type.GetTypeFromProgID(theProgramID, theServer)
            If myType Is Nothing Then
                Throw New Exception("Invalid ProgID or server.")
            End If
            Console.WriteLine("GUID for ProgID DirControl.DirList.1 is {0}.", myType.GUID.ToString())
        Catch e As Exception
            Console.WriteLine("An exception occurred.")
            Console.WriteLine("Source: {0}.", e.Source.ToString())
            Console.WriteLine("Message: {0}.", e.Message.ToString())
        End Try
    End Sub 'Main
End Class 'MainApp

SecurityCriticalAttribute

Requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

.NET Framework
Available since 1.1
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