SqueakyMouse

SqueakyMouse is a small application that enables you to play the mouse button sounds whenever you hit a button and when the ClickLock feature is active.

Allows you to trade the classic mouse button sounds for custom ones

The setup is quick and straightforward, particularly since it entails a simple operation of decompressing the archive. The program comes with a rudimentary interface that enables you to select the file sounds you want to play during a mouse event.
You should know that you can change the default files for other sounds that you enjoy or that might be useful for your project. On the other hand, you should know that the utility solely works with WAV files. Therefore, if you store sounds that you would like to use in different file formats, then you can convert them to WAV using other third-party software solutions.
As far as the options are concerned, they can be summarized to specifying whether you want the app to start with Windows minimized or you want to keep the app running in the background.

Lets you know when the ClickLock feature is enabled

While some users can argue that mouse sounds interfere with screen captures or audio recording, you should keep in mind that you can enable or disable the sounds that you want to play by checking or unchecking the option in the corresponding checkbox. Simply put, if you do not want to play a sound whenever you use the left or right button, then you can disable these features altogether.
A noteworthy function of the application is the notification for when Windows' ClickLock is active. In case you did not know, the feature allows you to select and drag items without pressing the mouse button. Since the process is silent and the mouse cursor does not change, the app provides you with a simple method to let you know it is on.

A tool for personalizing the mouse button sounds

All in all, if you are involved in a project that entails receiving notifications on mouse click events or just want to know when ClickLock is on, then maybe SqueakyMouse could lend you a hand.