public int AddShellIcon(string path, ShellIconType flags)
{
var info = new NativeMethods.SHFILEINFO();
try
{
var imageList = NativeMethods.SHGetFileInfo(
path, 0, ref info, (uint)Marshal.SizeOf(info),
((uint)flags | NativeMethods.SHGFI_SMALLICON | NativeMethods.SHGFI_SYSICONINDEX)
& ~NativeMethods.SHGFI_ICON
);
if (imageList == IntPtr.Zero)
return -1;
if (imageList != _handle)
throw new ArgumentException("Could not get image", "path");
return info.iIcon;
}
finally
{
if (info.hIcon != IntPtr.Zero)
NativeMethods.DestroyIcon(info.hIcon);
}
}
public SystemImageList()
{
var fileInfo = new NativeMethods.SHFILEINFO();
_handle = NativeMethods.SHGetFileInfo(
".txt",
0,
ref fileInfo,
(uint)Marshal.SizeOf(fileInfo),
NativeMethods.SHGFI_USEFILEATTRIBUTES | NativeMethods.SHGFI_SYSICONINDEX | NativeMethods.SHGFI_SMALLICON
);
Debug.Assert(_handle != IntPtr.Zero);
}
/// <summary>
/// Gets the information for the specified
/// file name and flags.
/// </summary>
public void GetInfo()
{
fileIcon = null;
typeName = "";
displayName = "";
NativeMethods.SHFILEINFO shfi = new NativeMethods.SHFILEINFO();
uint shfiSize = (uint)Marshal.SizeOf(shfi.GetType());
IntPtr ret = NativeMethods.SHGetFileInfo(
fileName, 0, ref shfi, shfiSize, (uint)(flags));
if (ret != IntPtr.Zero)
{
if (shfi.hIcon != IntPtr.Zero)
{
fileIcon = System.Drawing.Icon.FromHandle(shfi.hIcon);
// Now owned by the GDI+ object
//DestroyIcon(shfi.hIcon);
}
typeName = shfi.szTypeName;
displayName = shfi.szDisplayName;
}
else
{
int err = NativeMethods.GetLastError();
Console.WriteLine("Error {0}", err);
string txtS = new string('\0', 256);
int len = NativeMethods.FormatMessage(
NativeMethods.FORMAT_MESSAGE_FROM_SYSTEM | NativeMethods.FORMAT_MESSAGE_IGNORE_INSERTS,
IntPtr.Zero, err, 0, txtS, 256, 0);
Console.WriteLine("Len {0} text {1}", len, txtS);
// throw exception
}
}
