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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text; |
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using System.Runtime.InteropServices; |
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using System.Drawing; |
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|
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namespace libWin32.Win32.Threading |
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{ |
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public class ProcessIconEx |
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{ |
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[DllImport("Shell32", CharSet = CharSet.Auto)] |
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private static unsafe extern int ExtractIconEx( |
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string lpszFile, |
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int nIconIndex, |
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IntPtr[] phIconLarge, |
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IntPtr[] phIconSmall, |
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int nIcons); |
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[DllImport("user32.dll", EntryPoint = "DestroyIcon", SetLastError = true)] |
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private static unsafe extern int DestroyIcon(IntPtr hIcon); |
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public static Icon ExtractIConFromFile(string file, bool large) |
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{ |
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unsafe |
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{ |
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int readIconCount = 0; |
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IntPtr[] hDummy = new IntPtr[1] { IntPtr.Zero }; |
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IntPtr[] hIconEx = new IntPtr[1] { IntPtr.Zero }; |
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|
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try |
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{ |
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if (large) |
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readIconCount = ExtractIconEx(file, 0, hIconEx, hDummy, 1); |
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else |
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readIconCount = ExtractIconEx(file, 0, hDummy, hIconEx, 1); |
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|
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if (readIconCount > 0 && hIconEx[0] != IntPtr.Zero) |
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{ |
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// GET FIRST EXTRACTED ICON |
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Icon extractedIcon = (Icon)Icon.FromHandle(hIconEx[0]).Clone(); |
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|
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return extractedIcon; |
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} |
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else // NO ICONS READ |
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return null; |
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} |
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catch (Exception ex) |
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{ |
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/* EXTRACT ICON ERROR */ |
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|
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// BUBBLE UP |
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throw new ApplicationException("Could not extract icon", ex); |
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} |
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finally |
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{ |
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// RELEASE RESOURCES |
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foreach (IntPtr ptr in hIconEx) |
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if (ptr != IntPtr.Zero) |
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DestroyIcon(ptr); |
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|
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foreach (IntPtr ptr in hDummy) |
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if (ptr != IntPtr.Zero) |
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DestroyIcon(ptr); |
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} |
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} |
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} |
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} |
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} |
