16,472
社区成员
发帖
与我相关
我的任务
分享按键消息中LPARAM和WPARAM的含义
如果用键盘钩子拦截按键信息后，
里面的nCode,lparam,wparam具体的格式和含义是什么？
最好写出每个比特所代表的意思：）
比如当按一个键不放时，lparam内容是什么
里面的nCode,lparam,wparam具体的格式和含义是什么？
最好写出每个比特所代表的意思：）
比如当按一个键不放时，lparam内容是什么
...全文
请发表友善的回复…
发表回复
ExitWindows 2001-08-01
- 打赏
- 举报
up
微星1234 2001-08-01
- 打赏
- 举报
I can understand, thank u!
ExitWindows 2001-07-31
- 打赏
- 举报
up
hux 2001-07-31
- 打赏
- 举报
我的E文不好
NowCan 2001-07-31
- 打赏
- 举报
这要看MSDN。
wParam
Specifies the virtual-key code of the key that generated the keystroke message.
lParam
Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag. This parameter can be a combination of the following values: Value Description
0–15 Specifies the repeat count. The value is the number of times the keystroke is repeated as a result of the user's holding down the key.
16–23 Specifies the scan code. The value depends on the original equipment manufacturer (OEM).
24 Specifies whether the key is an extended key, such as a function key or a key on the numeric keypad. The value is 1 if the key is an extended key; otherwise, it is 0.
25–28 Reserved.
29 Specifies the context code. The value is 1 if the alt key is down; otherwise, it is 0.
30 Specifies the previous key state. The value is 1 if the key is down before the message is sent; it is 0 if the key is up.
31 Specifies the transition state. The value is 0 if the key is being pressed and 1 if it is being released.
wParam
Specifies the virtual-key code of the key that generated the keystroke message.
lParam
Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag. This parameter can be a combination of the following values: Value Description
0–15 Specifies the repeat count. The value is the number of times the keystroke is repeated as a result of the user's holding down the key.
16–23 Specifies the scan code. The value depends on the original equipment manufacturer (OEM).
24 Specifies whether the key is an extended key, such as a function key or a key on the numeric keypad. The value is 1 if the key is an extended key; otherwise, it is 0.
25–28 Reserved.
29 Specifies the context code. The value is 1 if the alt key is down; otherwise, it is 0.
30 Specifies the previous key state. The value is 1 if the key is down before the message is sent; it is 0 if the key is up.
31 Specifies the transition state. The value is 0 if the key is being pressed and 1 if it is being released.
