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LockType Enumeration

Summary

Defines the various flags that can be used to lock and unlock Multimedia features.

Syntax

C++

public enum LockType

Public Enum LockType

public enum class LockType

Members

Value	Member	Description
0x00000001	Computer	Unlocks the module at the computer level. Unlocking at the computer level should be avoided because it can cause unexpected behavior in other applications.
0x00000002	Application	Unlocks the module for this instance of the application. This is the recommended value.
0x00000004	ApplicationPath	Unlocks the module for this particular application. Use this for unlocking support in a third party application (like Windows Media Player).

Remarks

The MultimediaSupport.UnlockModule and MultimediaSupport.LockModules methods use a parameter of this type to indicate how to unlock or lock multimedia features.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
 
public void MultimediaSupportExample() 
{ 
   // pszKey is a string containing the serial number. It is defined like this: 
   // string pszKey = "MySerial"; 
   string pszAppId = "My Test Application"; 
 
   try 
   { 
      // unlock the multimedia feature 
      Leadtools.MediaFoundation.Common.MultimediaSupport.UnlockModule(pszKey, 
                                                                 Leadtools.MediaFoundation.Common.LockType.Application, 
                                                                 pszAppId); 
   } 
   catch 
   { 
      return; 
   } 
 
   // [use the multimedia feature here] 
 
   // lock the multimedia feature before exiting the app 
   try 
   { 
      Leadtools.MediaFoundation.Common.MultimediaSupport.LockModules(Leadtools.MediaFoundation.Common.LockType.Application, 
                                                                pszAppId); 
   } 
   catch 
   { 
      return; 
   } 
   _result = true; 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
 
Public Sub MultimediaSupportExample() 
   ' pszKey is a string containing the serial number. It is defined like this: 
   ' Private pszKey As String = "MyString" 
   Dim pszAppId As String = "My Test Application" 
 
   Try 
      ' unlock the multimedia feature 
      Leadtools.MediaFoundation.Common.MultimediaSupport.UnlockModule(pszKey, 
                                                                 Leadtools.MediaFoundation.Common.LockType.Application, 
                                                                 pszAppId) 
   Catch 
      Exit Sub 
   End Try 
 
   ' [use the multimedia feature here] 
 
   ' lock the multimedia feature before exiting the app 
   Try 
      Leadtools.MediaFoundation.Common.MultimediaSupport.LockModules(Leadtools.MediaFoundation.Common.LockType.Application, pszAppId) 
      _result = True 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub

Requirements

Target Platforms

Reference

Leadtools.MediaFoundation.Common Namespace

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Help Version 21.0.2021.7.2

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies