China DOS Union

Most laptops in use now need the FN+F8/F7 key combination
to switch to a projector


Is there any way for a batch file or script to achieve one-key switching, or programmatic switching?

I've been thinking about it for days. I used the SENDKEYS command in scripts before, but it doesn't have the FN key..

[ Last edited by bd123456789 on 2010-2-7 at 16:40 ]

Has anyone looked into this?

Following this!

I found these remarks online:

The Fn key is designed differently on different kinds of laptops, so their key values are all different.
http://www.qikan.com.cn/Article/dnah/dnah200820/dnah20082062.html

The Fn key is handled at the BIOS level, ordinary programs can't catch it.
http://topic.csdn.net/t/20060828/14/4980722.html

On laptops, the FN key does not serve an input function. Like the Ctrl key, it is purely a modifier key. The key combinations formed by FN and other keys may be supported directly by the BIOS (this is how most brands do it), or they may be at the software level (for example, Sony's approach). Of course, the most common form now is a hybrid one, meaning some key combinations are directly supported by the BIOS and can be used in any environment, while some combinations require additional software support in the operating system before they take effect.
http://www.360doc.com/content/06/1001/15/3032_220751.shtml

[ Last edited by qinchun36 on 2010-2-5 at 12:59 ]

Learning, learning.
Many thanks, many thanks!

Looks like BIOS settings are generally needed.
But for this, it depends on the computer's factory configuration.