Keyboard Messages
Windows also notifies an application about keypresses by sending messages. Table 9.2 lists the most common messages.
| Message | Meaning |
|---|---|
| WM_CHAR | The ASCII code for the letter if a character was pressed |
| WM_KEYDOWN | Notification that a key has been depressed |
| WM_KEYUP | Notification that a key has been released |
| WM_SYSCHAR | The ASCII code for the letter pressed while the Alt key is pressed |
| WM_SYSKEYDOWN | Notification that a key has been depressed while the Alt key is pressed |
| WM_SYSKEYUP | Notification that a key has been released while the Alt key is pressed |
The WM_CHAR message is generated by the TranslateMessage function in the message loop of the thread. This function is discussed in Chapter 5, "Message ...
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