学步园

38、获取系统中可用的驱动器列表和系统磁盘图标

        [StructLayout(LayoutKind.Sequential)]
        public struct SHFILEINFO 
        {
            public IntPtr hIcon; 
            public int iIcon;
            public int dwAttributes; 
            public string szDisplayName; 
            public string szTypeName; 
        }

        [DllImport("shell32")]
        private static extern int SHGetFileInfo(string pszPath,int dwFileAttributes,ref SHFILEINFO psfi,int cbFileInfo,int uFlags);
        const int SHGFI_ICON = 0x0100;
        const int SHGFI_LARGEICON = 0x0000; 

        static string[] drives;
        ImageList img=new ImageList();

        private void Form1_Load(object sender, System.EventArgs e)
        {
            this.listView1.LargeImageList=img;
            this.listView1.SmallImageList=img;
            this.listView1.StateImageList=img;

            drives=Environment.GetLogicalDrives();
            for(int i=0;i<drives.Length;i++)
            {
                string str_temp=drives[i];
                this.listView1.Items.Add(str_temp);
                this.listView1.Items[i].ImageIndex=i;
            }
            for(int i=0;i<drives.Length;i++)
            {
                SHFILEINFO FileInfo=new SHFILEINFO();
                SHGetFileInfo(drives[i],0,ref FileInfo,Marshal.SizeOf(FileInfo),SHGFI_ICON | SHGFI_LARGEICON);

                Icon myIcon;
                myIcon=Icon.FromHandle(FileInfo.hIcon);
                img.Images.Add(myIcon); 
            }

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39、设置应用程序的快捷键

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd,int wMsg,int wParam,int lParam);
        private const int WM_SETHOTKEY = 0x0032;
        private const int HOTKEYF_ALT = 0x0004;
        
        private void Form1_Load(object sender, System.EventArgs e)
        {
            int wHotkey;
            wHotkey=(HOTKEYF_ALT)*0x0100+'A';
            SendMessage(this.Handle, WM_SETHOTKEY, wHotkey, 0);
        }

40、列举系统中的环境变量（用户的环境变量希望知道的留个言）

        private void Form1_Load(object sender, System.EventArgs e)
        {
            this.listView1.View=View.Details;
            this.listView1.GridLines=true;
            this.listView1.Columns.Add("环境变量",150,HorizontalAlignment.Left); 
            this.listView1.Columns.Add("变量值",150,HorizontalAlignment.Left); 
            ListViewItem myItem;
            foreach (DictionaryEntry EnValue in Environment.GetEnvironmentVariables()) 
            {
                myItem= new ListViewItem(EnValue.Key.ToString(),0);
                myItem.SubItems.Add(EnValue.Value.ToString());
                this.listView1.Items.Add(myItem); 
            }
        }

41、得到系统的特殊路径

       private void Form1_Load(object sender, System.EventArgs e)
        {
            //System
            this.listView1.View=View.Details;
            this.listView1.GridLines=true;
            this.listView1.Columns.Add("环境变量",150,HorizontalAlignment.Left); 
            this.listView1.Columns.Add("变量值",150,HorizontalAlignment.Left); 
            ListViewItem myItem;

            myItem= new ListViewItem(Environment.SpecialFolder.ApplicationData.ToString(),0);
            myItem.SubItems.Add(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData));
            this.listView1.Items.Add(myItem); 
            
            myItem= new ListViewItem(Environment.SpecialFolder.Favorites.ToString(),0);
            myItem.SubItems.Add(Environment.GetFolderPath(Environment.SpecialFolder.Favorites));
            this.listView1.Items.Add(myItem); 

            myItem= new ListViewItem(Environment.SpecialFolder.Cookies.ToString(),0);
            myItem.SubItems.Add(Environment.GetFolderPath(Environment.SpecialFolder.Cookies));
            this.listView1.Items.Add(myItem); 

            myItem= new ListViewItem(Environment.SpecialFolder.System.ToString(),0);
            myItem.SubItems.Add(Environment.GetFolderPath(Environment.SpecialFolder.System));
            this.listView1.Items.Add(myItem); 
        }

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42、关闭指定的程序

            Process[] myProcesses;
            myProcesses = Process.GetProcessesByName("Notepad");
            foreach (Process instance in myProcesses)
            {
                instance.WaitForExit(3000);
                instance.CloseMainWindow();
            }

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