WM_KEYDOWN

キーを押してメッセージを表示

#define WM_KEYDOWN                      0x0100

Parameters

wParam

The virtual-key code of the nonsystem key. See Virtual-Key Codes.
Virtual-Key Codes.仮想キーコードは、どのキーが押されたかを示す

lParam The repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag, as shown following.

Bits
Meaning
0-15
The repeat count for the current message. The value is the number of times the keystroke is autorepeated as a result of the user holding down the key. If the keystroke is held long enough, multiple messages are sent. However, the repeat count is not cumulative.
16-23
The scan code. The value depends on the OEM.
24
Indicates whether the key is an extended key, such as the right-hand ALT and CTRL keys that appear on an enhanced 101- or 102-key keyboard. The value is 1 if it is an extended key; otherwise, it is 0.
25-28
Reserved; do not use.
29
The context code. The value is always 0 for a WM_KEYDOWN message.
30
The previous key state. The value is 1 if the key is down before the message is sent, or it is zero if the key is up.
31
The transition state. The value is always 0 for a WM_KEYDOWN message.