Type.GetTypeFromProgID Method (String, Boolean)


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Gets the type associated with the specified program identifier (ProgID), specifying whether to throw an exception if an error occurs while loading the type.

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

Public Shared Function GetTypeFromProgID (
	progID As String,
	throwOnError As Boolean
) As Type


Type: System.String

The ProgID of the type to get.

Type: System.Boolean

true to throw any exception that occurs.


false to ignore any exception that occurs.

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

progID is null.


The specified ProgID is not registered.

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 Program IDs are not used in Microsoft .NET Framework because they have been superseded by the concept of namespace.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, specifying whether to throw an exception if the ProgID is invalid. The example then displays the ClassID related to the ProgID, along with any applicable exception message.

Imports System
Class MainApp
    Public Shared Sub Main()
            ' Use the ProgID HKEY_CLASSES_ROOT\DirControl.DirList.1.
            Dim myString1 As String = "DIRECT.ddPalette.3"
            ' Use a nonexistent ProgID WrongProgID.
            Dim myString2 As String = "WrongProgID"
            ' Make a call to the method to get the type information of the given ProgID.
            Dim myType1 As Type = Type.GetTypeFromProgID(myString1, True)
            Console.WriteLine("GUID for ProgID DirControl.DirList.1 is {0}.", myType1.GUID.ToString())
            ' Throw an exception because the ProgID is invalid and the throwOnError 
            ' parameter is set to True.
            Dim myType2 As Type = Type.GetTypeFromProgID(myString2, True)
        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


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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