My sample app is getting crash while registering to Filechangeinfo notification
- by Solitaire
public partial class Form1 : Form
{
[DllImport("coredll.dll")]
static extern int SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
[DllImport("coredll.dll")]
static extern IntPtr CallWindowProc(IntPtr lpPrevWndFunc, IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
[DllImport("coredll.dll")]
public static extern IntPtr GetWindowLong(IntPtr hWnd, int nIndex);
//public struct tagSHCHANGENOTIFYENTRY
//{
// [MarshalAs(UnmanagedType.SysUInt)]
// public ulong dwEventMask;
// [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4096)]
// public string WatchDir;
// [MarshalAs(UnmanagedType.Bool)]
// public bool fRecursive;
//}
//tagSHCHANGENOTIFYENTRY test;
//[DllImport("aygshell.dll")]
//static extern bool SHChangeNotifyRegister(IntPtr hwnd, ref tagSHCHANGENOTIFYENTRY test);
const int GWL_WNDPROC = -4;
public delegate int WindProc(IntPtr hWnd, int msg, IntPtr Wparam, IntPtr lparam);
static private WindProc SampleProc;
IntPtr OldDefProc = IntPtr.Zero;
public enum SHCNE : uint
{
SHCNE_RENAMEITEM = 0x00000001,
SHCNE_CREATE = 0x00000002,
SHCNE_DELETE = 0x00000004,
SHCNE_MKDIR = 0x00000008,
SHCNE_RMDIR = 0x00000010,
SHCNE_MEDIAINSERTED = 0x00000020,
SHCNE_MEDIAREMOVED = 0x00000040,
SHCNE_DRIVEREMOVED = 0x00000080,
SHCNE_DRIVEADD = 0x00000100,
SHCNE_NETSHARE = 0x00000200,
SHCNE_NETUNSHARE = 0x00000400,
SHCNE_ATTRIBUTES = 0x00000800,
SHCNE_UPDATEDIR = 0x00001000,
SHCNE_UPDATEITEM = 0x00002000,
SHCNE_SERVERDISCONNECT = 0x00004000,
SHCNE_UPDATEIMAGE = 0x00008000,
SHCNE_DRIVEADDGUI = 0x00010000,
SHCNE_RENAMEFOLDER = 0x00020000,
SHCNE_FREESPACE = 0x00040000,
SHCNE_EXTENDED_EVENT = 0x04000000,
SHCNE_ASSOCCHANGED = 0x08000000,
SHCNE_DISKEVENTS = 0x0002381F,
SHCNE_GLOBALEVENTS = 0x0C0581E0,
SHCNE_ALLEVENTS = 0x7FFFFFFF,
SHCNE_INTERRUPT = 0x80000000,
}
public enum SHCNF
{
SHCNF_IDLIST = 0x0000,
SHCNF_PATHA = 0x0001,
SHCNF_PRINTERA = 0x0002,
SHCNF_DWORD = 0x0003,
SHCNF_PATHW = 0x0005,
SHCNF_PRINTERW = 0x0006,
SHCNF_TYPE = 0x00FF,
SHCNF_FLUSH = 0x1000,
SHCNF_FLUSHNOWAIT = 0x2000
}
public const uint WM_SHNOTIFY = 0x0401;
private const int WM_FILECHANGEINFO = (0x8000 + 0x101);
public struct SHChangeNotifyEntry
{
public IntPtr pIdl;
[MarshalAs(UnmanagedType.Bool)]
public Boolean Recursively;
}
[DllImport("coredll.dll", EntryPoint = "#2", CharSet = CharSet.Auto)]
private static extern uint SHChangeNotifyRegister(
IntPtr hWnd,
SHCNF fSources,
SHCNE fEvents,
uint wMsg,
int cEntries,
ref SHChangeNotifyEntry pFsne);
[DllImport("Ceshell.dll", CharSet = CharSet.Auto)]
private static extern uint SHGetSpecialFolderLocation(
IntPtr hWnd,
CSIDL nFolder,
out IntPtr Pidl);
public enum CSIDL
{
/// <summary>
/// Desktop
/// </summary>
CSIDL_DESKTOP = 0x0000,
/// <summary>
/// Internet Explorer (icon on desktop)
/// </summary>
CSIDL_INTERNET = 0x0001,
/// <summary>
/// Start Menu\Programs
/// </summary>
CSIDL_PROGRAMS = 0x0002,
/// <summary>
/// My Computer\Control Panel
/// </summary>
CSIDL_CONTROLS = 0x0003,
/// <summary>
/// My Computer\Printers
/// </summary>
CSIDL_PRINTERS = 0x0004,
/// <summary>
/// My Documents
/// </summary>
CSIDL_PERSONAL = 0x0005,
/// <summary>
/// user name\Favorites
/// </summary>
CSIDL_FAVORITES = 0x0006,
/// <summary>
/// Start Menu\Programs\Startup
/// </summary>
CSIDL_STARTUP = 0x0007,
/// <summary>
/// user name\Recent
/// </summary>
CSIDL_RECENT = 0x0008,
/// <summary>
/// user name\SendTo
/// </summary>
CSIDL_SENDTO = 0x0009,
/// <summary>
/// desktop\Recycle Bin
/// </summary>
CSIDL_BITBUCKET = 0x000a,
/// <summary>
/// user name\Start Menu
/// </summary>
CSIDL_STARTMENU = 0x000b,
/// <summary>
/// logical "My Documents" desktop icon
/// </summary>
CSIDL_MYDOCUMENTS = 0x000c,
/// <summary>
/// "My Music" folder
/// </summary>
CSIDL_MYMUSIC = 0x000d,
/// <summary>
/// "My Videos" folder
/// </summary>
CSIDL_MYVIDEO = 0x000e,
/// <summary>
/// user name\Desktop
/// </summary>
CSIDL_DESKTOPDIRECTORY = 0x0010,
/// <summary>
/// My Computer
/// </summary>
CSIDL_DRIVES = 0x0011,
/// <summary>
/// Network Neighborhood (My Network Places)
/// </summary>
CSIDL_NETWORK = 0x0012,
/// <summary>
/// user name>nethood
/// </summary>
CSIDL_NETHOOD = 0x0013,
/// <summary>
/// windows\fonts
/// </summary>
CSIDL_FONTS = 0x0014,
CSIDL_TEMPLATES = 0x0015,
/// <summary>
/// All Users\Start Menu
/// </summary>
CSIDL_COMMON_STARTMENU = 0x0016,
/// <summary>
/// All Users\Start Menu\Programs
/// </summary>
CSIDL_COMMON_PROGRAMS = 0X0017,
/// <summary>
/// All Users\Startup
/// </summary>
CSIDL_COMMON_STARTUP = 0x0018,
/// <summary>
/// All Users\Desktop
/// </summary>
CSIDL_COMMON_DESKTOPDIRECTORY = 0x0019,
/// <summary>
/// user name\Application Data
/// </summary>
CSIDL_APPDATA = 0x001a,
/// <summary>
/// user name\PrintHood
/// </summary>
CSIDL_PRINTHOOD = 0x001b,
/// <summary>
/// user name\Local Settings\Applicaiton Data (non roaming)
/// </summary>
CSIDL_LOCAL_APPDATA = 0x001c,
/// <summary>
/// non localized startup
/// </summary>
CSIDL_ALTSTARTUP = 0x001d,
/// <summary>
/// non localized common startup
/// </summary>
CSIDL_COMMON_ALTSTARTUP = 0x001e,
CSIDL_COMMON_FAVORITES = 0x001f,
CSIDL_INTERNET_CACHE = 0x0020,
CSIDL_COOKIES = 0x0021,
CSIDL_HISTORY = 0x0022,
/// <summary>
/// All Users\Application Data
/// </summary>
CSIDL_COMMON_APPDATA = 0x0023,
/// <summary>
/// GetWindowsDirectory()
/// </summary>
CSIDL_WINDOWS = 0x0024,
/// <summary>
/// GetSystemDirectory()
/// </summary>
CSIDL_SYSTEM = 0x0025,
/// <summary>
/// C:\Program Files
/// </summary>
CSIDL_PROGRAM_FILES = 0x0026,
/// <summary>
/// C:\Program Files\My Pictures
/// </summary>
CSIDL_MYPICTURES = 0x0027,
/// <summary>
/// USERPROFILE
/// </summary>
CSIDL_PROFILE = 0x0028,
/// <summary>
/// x86 system directory on RISC
/// </summary>
CSIDL_SYSTEMX86 = 0x0029,
/// <summary>
/// x86 C:\Program Files on RISC
/// </summary>
CSIDL_PROGRAM_FILESX86 = 0x002a,
/// <summary>
/// C:\Program Files\Common
/// </summary>
CSIDL_PROGRAM_FILES_COMMON = 0x002b,
/// <summary>
/// x86 Program Files\Common on RISC
/// </summary>
CSIDL_PROGRAM_FILES_COMMONX86 = 0x002c,
/// <summary>
/// All Users\Templates
/// </summary>
CSIDL_COMMON_TEMPLATES = 0x002d,
/// <summary>
/// All Users\Documents
/// </summary>
CSIDL_COMMON_DOCUMENTS = 0x002e,
/// <summary>
/// All Users\Start Menu\Programs\Administrative Tools
/// </summary>
CSIDL_COMMON_ADMINTOOLS = 0x002f,
/// <summary>
/// user name\Start Menu\Programs\Administrative Tools
/// </summary>
CSIDL_ADMINTOOLS = 0x0030,
/// <summary>
/// Network and Dial-up Connections
/// </summary>
CSIDL_CONNECTIONS = 0x0031,
/// <summary>
/// All Users\My Music
/// </summary>
CSIDL_COMMON_MUSIC = 0x0035,
/// <summary>
/// All Users\My Pictures
/// </summary>
CSIDL_COMMON_PICTURES = 0x0036,
/// <summary>
/// All Users\My Video
/// </summary>
CSIDL_COMMON_VIDEO = 0x0037,
/// <summary>
/// Resource Direcotry
/// </summary>
CSIDL_RESOURCES = 0x0038,
/// <summary>
/// Localized Resource Direcotry
/// </summary>
CSIDL_RESOURCES_LOCALIZED = 0x0039,
/// <summary>
/// Links to All Users OEM specific apps
/// </summary>
CSIDL_COMMON_OEM_LINKS = 0x003a,
/// <summary>
/// USERPROFILE\Local Settings\Application Data\Microsoft\CD Burning
/// </summary>
CSIDL_CDBURN_AREA = 0x003b,
/// <summary>
/// Computers Near Me (computered from Workgroup membership)
/// </summary>
CSIDL_COMPUTERSNEARME = 0x003d,
/// <summary>
/// combine with CSIDL_ value to force folder creation in SHGetFolderPath()
/// </summary>
CSIDL_FLAG_CREATE = 0x8000,
/// <summary>
/// combine with CSIDL_ value to return an unverified folder path
/// </summary>
CSIDL_FLAG_DONT_VERIFY = 0x4000,
/// <summary>
/// combine with CSIDL_ value to insure non-alias versions of the pidl
/// </summary>
CSIDL_FLAG_NO_ALIAS = 0x1000,
/// <summary>
/// combine with CSIDL_ value to indicate per-user init (eg. upgrade)
/// </summary>
CSIDL_FLAG_PER_USER_INIT = 0x0800,
/// <summary>
/// mask for all possible
/// </summary>
CSIDL_FLAG_MASK = 0xFF00,
}
public enum SHGetFolderLocationReturnValues : uint
{
/// <summary>
/// Success
/// </summary>
S_OK = 0x00000000,
/// <summary>
/// The CSIDL in nFolder is valid but the folder does not exist
/// </summary>
S_FALSE = 0x00000001,
/// <summary>
/// The CSIDL in nFolder is not valid
/// </summary>
E_INVALIDARG = 0x80070057
}
public static IntPtr GetPidlFromFolderID(IntPtr hWnd, CSIDL Id)
{
IntPtr pIdl = IntPtr.Zero;
SHGetFolderLocationReturnValues res = (SHGetFolderLocationReturnValues)
SHGetSpecialFolderLocation(
hWnd,
Id,
out pIdl);
return (pIdl);
}
public Form1()
{
InitializeComponent();
SampleProc = new WindProc (SubclassWndProc);
OldDefProc = GetWindowLong(this.Handle, GWL_WNDPROC);
SetWindowLong(this.Handle, GWL_WNDPROC, Marshal.GetFunctionPointerForDelegate(SampleProc)/*SampleProc.Method.MethodHandle.Value.ToInt32()*/);
//tagSHCHANGENOTIFYENTRY changeentry = new tagSHCHANGENOTIFYENTRY();
//changeentry.dwEventMask = (ulong)SHCNE.SHCNE_ALLEVENTS;
//changeentry.fRecursive = true;
//changeentry.WatchDir = null;
//SHChangeNotifyRegister(this.Handle, ref changeentry);
SHChangeNotifyEntry changeentry = new SHChangeNotifyEntry();
changeentry.pIdl = GetPidlFromFolderID(this.Handle, CSIDL.CSIDL_DESKTOP);
changeentry.Recursively = true;
try
{
uint notifyid = SHChangeNotifyRegister(
this.Handle,
SHCNF.SHCNF_TYPE | SHCNF.SHCNF_IDLIST,
SHCNE.SHCNE_ALLEVENTS,
WM_FILECHANGEINFO,
1, ref changeentry);
}
catch (Exception ee)
{
}
i am failing in SHChangeNotifyRegister please help me.. tell me the reason why i am crashing..same code work fine for desktop.. please help
Thanks.
