SendMessage
What Does Activation Key Mean?
An activation key is a code to register or activate a software application. It usually consists of letters and numbers with a dotted fundamental movement between sections. Newer models of software products eliminate the activation key as an authorization mechanism. With the development of cloud computing services, many types of software have been purchased online and used online on a subscription basis. It eliminates the need to use activation keys to authenticate users. An activation key is a by-product of the system where the user purchases the code and execution software for the application and downloads all of the code to their computer or device. New methods are rapidly replacing the traditional form of licensing.
SendMessage is a little tool to send Windows messages to any window. You can test your application by actually triggering system messages, but especially the WM_ENDSESSION message and its purpose makes it impossible to attach a debugger to your application once Windows sends you that message. With this tool, you can send that message and any other message you like to your application window. And you can do that while you have a debugger attached to your application. To find the window handle of your application, either drag the target icon in the upper left to your main window, or click on the “Windows” button and select the window from the list. There are a few window messages predefined in SendMessage. If you need to send a message that is not in the list, just enter the number of the message and any required values for WPARAM and LPARAM manually.