public static bool ExtractIconFromExecutable(FileInfo sourceFile, FileInfo targetFile)
{
IntPtr hModule = LoadLibraryEx(sourceFile.FullName, IntPtr.Zero, LOAD_LIBRARY_AS_DATAFILE);
if (hModule == IntPtr.Zero)
{
throw new FileNotFoundException($"Library {sourceFile.Name} not found.", sourceFile.FullName);
}
ENUMRESNAMEPROC callback = (h, t, name, l) =>
{
var dir = GetDataFromResource(hModule, RT_GROUP_ICON, name);
// Calculate the size of an entire .icon file.
int count = BitConverter.ToUInt16(dir, 4); // GRPICONDIR.idCount
int len = 6 + 16 * count; // sizeof(ICONDIR) + sizeof(ICONDIRENTRY) * count
for (int i = 0; i < count; ++i)
{
len += BitConverter.ToInt32(dir, 6 + 14 * i + 8); // GRPICONDIRENTRY.dwBytesInRes
}
using (FileStream targetStream = targetFile.Create())
using (var dst = new BinaryWriter(targetStream))
{
// Copy GRPICONDIR to ICONDIR.
dst.Write(dir, 0, 6);
int picOffset = 6 + 16 * count; // sizeof(ICONDIR) + sizeof(ICONDIRENTRY) * count
for (int i = 0; i < count; ++i)
{
// Load the picture.
ushort id = BitConverter.ToUInt16(dir, 6 + 14 * i + 12); // GRPICONDIRENTRY.nID
var pic = GetDataFromResource(hModule, RT_ICON, (IntPtr)id);
// Copy GRPICONDIRENTRY to ICONDIRENTRY.
dst.Seek(6 + 16 * i, 0);
dst.Write(dir, 6 + 14 * i, 8); // First 8bytes are identical.
dst.Write(pic.Length); // ICONDIRENTRY.dwBytesInRes
dst.Write(picOffset); // ICONDIRENTRY.dwImageOffset
// Copy a picture.
dst.Seek(picOffset, 0);
dst.Write(pic, 0, pic.Length);
picOffset += pic.Length;
}
}
return(true);
};
bool ok = EnumResourceNames(hModule, RT_GROUP_ICON, callback, IntPtr.Zero);
FreeLibrary(hModule);
return(ok);
}
private static void Load(string fileName)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
Icons = null;
IntPtr hModule = IntPtr.Zero;
try
{
hModule = LoadLibraryEx(fileName, IntPtr.Zero, LOAD_LIBRARY_AS_DATAFILE);
if (hModule == IntPtr.Zero)
{
throw new Win32Exception();
}
List <byte[]> tmpData = new List <byte[]>();
ENUMRESNAMEPROC callback = (h, t, name, l) =>
{
byte[] iconBuffer = GetDataFromResource(hModule, RT_GROUP_ICON, name);
tmpData.Add(iconBuffer);
return(true);
};
EnumResourceNames(hModule, RT_GROUP_ICON, callback, IntPtr.Zero);
Icons = new IconBitmapDecoder[tmpData.Count];
for (int i = 0; i < tmpData.Count; i++)
{
MemoryStream mem = new MemoryStream(tmpData[i]);
Icons[i] = new IconBitmapDecoder();
Icons[i].Open(mem);
}
}
finally
{
if (hModule != IntPtr.Zero)
{
FreeLibrary(hModule);
}
}
}
public static extern bool EnumResourceNames(
[In] IntPtr hModule, [In] [MarshalAs(UnmanagedType.LPTStr)] string lpType, ENUMRESNAMEPROC lpEnumFunc, [MarshalAs(UnmanagedType.SysInt)] int lParam);
private void Initialize(string fileName)
{
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
IntPtr hModule = IntPtr.Zero;
try
{
hModule = Kernel32.LoadLibraryEx(fileName, IntPtr.Zero, LOAD_LIBRARY_AS_IMAGE_RESOURCE);
if (hModule == IntPtr.Zero)
{
throw new Win32Exception();
}
FileName = GetFileName(hModule);
// Enumerate the icon resource and build .ico files in memory.
var tmpData = new List <byte[]>();
ENUMRESNAMEPROC callback = (h, t, name, l) =>
{
// Refer the following URL for the data structures used here:
// http://msdn.microsoft.com/en-us/library/ms997538.aspx
// RT_GROUP_ICON resource consists of a GRPICONDIR and GRPICONDIRENTRY's.
var dir = GetDataFromResource(hModule, RT_GROUP_ICON, name);
// Calculate the size of an entire .icon file.
int count = BitConverter.ToUInt16(dir, 4); // GRPICONDIR.idCount
int len = 6 + 16 * count; // sizeof(ICONDIR) + sizeof(ICONDIRENTRY) * count
for (int i = 0; i < count; ++i)
{
len += BitConverter.ToInt32(dir, 6 + 14 * i + 8); // GRPICONDIRENTRY.dwBytesInRes
}
using (var dst = new BinaryWriter(new MemoryStream(len)))
{
// Copy GRPICONDIR to ICONDIR.
dst.Write(dir, 0, 6);
int picOffset = 6 + 16 * count; // sizeof(ICONDIR) + sizeof(ICONDIRENTRY) * count
for (int i = 0; i < count; ++i)
{
// Load the picture.
ushort id = BitConverter.ToUInt16(dir, 6 + 14 * i + 12); // GRPICONDIRENTRY.nID
var pic = GetDataFromResource(hModule, RT_ICON, (IntPtr)id);
// Copy GRPICONDIRENTRY to ICONDIRENTRY.
dst.Seek(6 + 16 * i, SeekOrigin.Begin);
dst.Write(dir, 6 + 14 * i, 8); // First 8bytes are identical.
dst.Write(pic.Length); // ICONDIRENTRY.dwBytesInRes
dst.Write(picOffset); // ICONDIRENTRY.dwImageOffset
// Copy a picture.
dst.Seek(picOffset, SeekOrigin.Begin);
dst.Write(pic, 0, pic.Length);
picOffset += pic.Length;
}
tmpData.Add(((MemoryStream)dst.BaseStream).ToArray());
}
return(true);
};
Kernel32.EnumResourceNames(hModule, RT_GROUP_ICON, callback, IntPtr.Zero);
iconData = tmpData.ToArray();
}
finally
{
if (hModule != IntPtr.Zero)
{
Kernel32.FreeLibrary(hModule);
}
}
}
public static extern bool EnumResourceNames(IntPtr hinst, IntPtr nType, ENUMRESNAMEPROC callback, IntPtr lParam);
public static extern bool EnumResourceNames(IntPtr hModule, IntPtr lpszType, ENUMRESNAMEPROC lpEnumFunc, IntPtr lParam);
public static extern int EnumResourceNames(IntPtr hModule, RT rtType, ENUMRESNAMEPROC lpEnumFunc, IntPtr lParam);
public static extern bool EnumResourceNames( IntPtr hModule, uint lpszType, ENUMRESNAMEPROC lpEnumFunc, IntPtr lParam);
public static Stream ExtractIcon(string FileName, int Index)
{
MemoryStream output = null;
byte[] iconBuffer = null;
if (FileName == null)
{
throw new ArgumentNullException("fileName");
}
Icons = null;
IntPtr hModule = IntPtr.Zero;
try
{
hModule = LoadLibraryEx(FileName, IntPtr.Zero, LOAD_LIBRARY_AS_DATAFILE);
if (hModule == IntPtr.Zero)
{
throw new Win32Exception();
}
int counter = 0;
ENUMRESNAMEPROC callback = (h, t, name, l) =>
{
if (counter == Index)
{
byte[] data = GetDataFromResource(hModule, RT_GROUP_ICON, name);
int count = BitConverter.ToUInt16(data, 4); // GRPICONDIR.idCount
int len = 6 + 16 * count; // sizeof(ICONDIR) + sizeof(ICONDIRENTRY) * count
for (int i = 0; i < count; ++i)
{
len += BitConverter.ToInt32(data, 6 + 14 * i + 8); // GRPICONDIRENTRY.dwBytesInRes
}
using (var dst = new BinaryWriter(new MemoryStream(len)))
{
// Copy GRPICONDIR to ICONDIR.
dst.Write(data, 0, 6);
int picOffset = 6 + 16 * count; // sizeof(ICONDIR) + sizeof(ICONDIRENTRY) * count
for (int i = 0; i < count; ++i)
{
// Load the picture.
ushort id = BitConverter.ToUInt16(data, 6 + 14 * i + 12); // GRPICONDIRENTRY.nID
var pic = GetDataFromResource(hModule, RT_ICON, (IntPtr)id);
// Copy GRPICONDIRENTRY to ICONDIRENTRY.
dst.Seek(6 + 16 * i, SeekOrigin.Begin);
dst.Write(data, 6 + 14 * i, 8); // First 8bytes are identical.
dst.Write(pic.Length); // ICONDIRENTRY.dwBytesInRes
dst.Write(picOffset); // ICONDIRENTRY.dwImageOffset
// Copy a picture.
dst.Seek(picOffset, SeekOrigin.Begin);
dst.Write(pic, 0, pic.Length);
picOffset += pic.Length;
}
iconBuffer = (((MemoryStream)dst.BaseStream).ToArray());
}
}
counter += 1;
return(true);
};
EnumResourceNames(hModule, RT_GROUP_ICON, callback, IntPtr.Zero);
}
finally
{
if (hModule != IntPtr.Zero)
{
FreeLibrary(hModule);
}
}
if (iconBuffer != null)
{
MemoryStream iconStream = new MemoryStream(iconBuffer);
output = new MemoryStream(iconBuffer);
}
return(output);
}
public static List <Icon> LoadIcon(string fileName)
{
IntPtr hModule = IntPtr.Zero;
var iconDatas = new List <byte[]>();
byte[] GetDataFromResource(IntPtr hmodule, IntPtr type, IntPtr name)
{
IntPtr hResInfo = FindResource(hmodule, name, type);
IntPtr hResData = LoadResource(hmodule, hResInfo);
IntPtr pResData = LockResource(hResData);
uint size = SizeofResource(hmodule, hResInfo);
var bytes = new byte[size];
Marshal.Copy(pResData, bytes, 0, bytes.Length);
return(bytes);
}
try
{
hModule = LoadLibraryEx(fileName, IntPtr.Zero, 0x00000002);
ENUMRESNAMEPROC callback = (h, t, name, l) => {
var dir = GetDataFromResource(hModule, (IntPtr)14, name);
int count = BitConverter.ToUInt16(dir, 4);
int len = 6 + 16 * count;
for (int i = 0; i < count; ++i)
{
len += BitConverter.ToInt32(dir, 6 + 14 * i + 8);
}
using (var dst = new BinaryWriter(new MemoryStream(len)))
{
dst.Write(dir, 0, 6);
int picOffset = 6 + 16 * count;
for (int i = 0; i < count; ++i)
{
ushort id = BitConverter.ToUInt16(dir, 6 + 14 * i + 12);
var pic = GetDataFromResource(hModule, (IntPtr)3, (IntPtr)id);
dst.Seek(6 + 16 * i, SeekOrigin.Begin);
dst.Write(dir, 6 + 14 * i, 8);
dst.Write(pic.Length);
dst.Write(picOffset);
dst.Seek(picOffset, SeekOrigin.Begin);
dst.Write(pic, 0, pic.Length);
picOffset += pic.Length;
}
iconDatas.Add(((MemoryStream)dst.BaseStream).ToArray());
}
return(true);
};
EnumResourceNames(hModule, (IntPtr)14, callback, IntPtr.Zero);
}
finally
{
if (hModule != IntPtr.Zero)
{
FreeLibrary(hModule);
}
}
var icons = new List <Icon>();
for (int i = 0; i < iconDatas.Count; i++)
{
using (var ms = new MemoryStream(iconDatas[i]))
{
icons.Add(new Icon(ms));
}
}
return(icons);
}
