C＃：键盘钩子 [英] C# : Keyboard Hook

问题描述

我不知道问题的更好的头衔，但我心底说明我的问题。

i dont know a better title for the question , but i`ll illustrate my problem.

我工作的应用程序，它就像一个MP3播放器，它使用多媒体键播放/暂停，停止乐曲，其实我做这工作，但FormApplication必须在顶部[聚焦]

I am working on application that acts like a mp3 player , it uses the Multimedia keys to play/pause , stop the song , i actually made it work but the FormApplication must be in the top [Focused]

    protected override void WndProc(ref Message msg)
    {
        if (msg.Msg == 0x319)   // WM_APPCOMMAND message
        {
            // extract cmd from LPARAM (as GET_APPCOMMAND_LPARAM macro does)
            int cmd = (int)((uint)msg.LParam >> 16 & ~0xf000);
            switch (cmd)
            {
                case 13:  // APPCOMMAND_MEDIA_STOP constant
                    MessageBox.Show("Stop");
                    break;
                case 14:  // APPCOMMAND_MEDIA_PLAY_PAUSE
                    MessageBox.Show("Play/Pause");
                    break;
                case 11:  // APPCOMMAND_MEDIA_NEXTTRACK
                    MessageBox.Show("Next");
                    break;
                case 12:  // APPCOMMAND_MEDIA_PREVIOUSTRACK
                    MessageBox.Show("Previous");
                    break;
                default:  
                    break;
            }
        }
        base.WndProc(ref msg);
    }


    private void Form1_KeyPress(object sender, KeyPressEventArgs e)
    {
        Message m = new Message();
        m.Msg = e.KeyChar;

        WndProc(ref m);
    }

所以我需要做的是：使多媒体键工作，即使该方案的背景，而不是在顶部或专注，就像AOL的Winamp和Windows Media Player是如何工作的。

So what i need to do is : making the multimedia keys work even if the program is on the background and is not on top or focused , just like how winamp and Windows Media Player works.

我在互联网上搜索了很多，但其中大部分给了我类似我使用的一个方法。

I searched a lot on the internet but most of them gives me a way similar to the one i am using.

感谢您很多关于您的帮助提前。

Thank you a lot for your help in advance.

推荐答案

<一个href=\"http://www.$c$cproject.com/Articles/7294/Processing-Global-Mouse-and-Keyboard-Hooks-in-C\">Processing全球鼠标和键盘钩子在C＃。

我发现这篇文章非常有用。

I found that article quite useful.

这篇关于C＃：键盘钩子的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！