The Message structure is a fundamental part of the Windows operating system's message passing mechanism. It's used to send and receive messages between different parts of the system, such as applications and the operating system itself.
Each Message structure contains information about a specific event or operation that needs to be communicated. This includes the message identifier, the window handle that the message is intended for, and the data associated with the message.
| Name | Type | Description |
|---|---|---|
| wParam | DWORD | Additional data related to the message. |
| lParam | DWORD | Additional data related to the message. |
// Example: Sending a message to a window
SendMessage(hWnd, WM_PAINT, 0, NULL);