VB.NET语言 开发带滑动条的音量控制与静音切换

VB.NET阿木 发布于 2025-05-28 8 次阅读

VB.NET【1】音量控制【2】与静音切换【3】滑动条实现

在Windows应用程序中，音量控制与静音切换是用户经常需要的功能。使用VB.NET开发这样的功能，我们可以通过操作Windows API【4】来实现。本文将围绕这一主题，详细介绍如何使用VB.NET创建一个带有滑动条的音量控制与静音切换界面。

1. 环境准备

在开始编写代码之前，请确保您的开发环境已经安装了Visual Studio【5】，并且已经创建了一个VB.NET Windows Forms【6】应用程序项目。

2. 设计界面

我们需要设计一个简单的界面，包括一个滑动条（TrackBar【7】）和一个按钮（Button【8】）用于切换静音。

1. 在Visual Studio中，打开Form设计器。
2. 添加一个TrackBar控件【9】，将其Name属性【10】设置为`trackBarVolume`。
3. 添加一个Button控件，将其Name属性设置为`buttonMute`。
4. 设置TrackBar的Minimum属性为0，Maximum属性为100，Value属性为50，表示默认音量为50%。
5. 设置Button的Text属性为“静音”。

3. 音量控制与静音切换

接下来，我们需要编写代码来实现音量控制与静音切换的功能。

3.1 引入必要的命名空间【11】

在代码文件中，首先引入以下命名空间：

vb.net
Imports System.Runtime.InteropServices
Imports System.Text

3.2 定义API函数

我们需要使用Windows API来控制音量和静音。以下是相关的API函数：

```vb.net
Public Declare Function waveOutGetVolume【12】 Lib "winmm.dll【13】" (ByVal uDeviceID【14】 As Integer, ByRef dwVolume【15】 As Integer) As Integer
Public Declare Function waveOutSetVolume【16】 Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer
Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByRef dwVolume As Integer) As Integer
Public Declare Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As