migrate Pilz.Win32 & optimize Pilz & Pilz.IO

Pilz.Win32/Native/Shell32.cs

@@ -0,0 +1,68 @@
+using System.Runtime.InteropServices;
+
+namespace Pilz.Win32.Native;
+
+
+public class Shell32
+{
+
+    /// <summary>
+    ///     Creates an array of handles to large or small icons extracted from
+    ///     the specified executable file, dynamic-link library (DLL), or icon
+    ///     file. 
+    /// </summary>
+    /// <param name="lpszFile">
+    ///     Name of an executable file, DLL, or icon file from which icons will
+    ///     be extracted.
+    /// </param>
+    /// <param name="nIconIndex">
+    ///     <para>
+    ///         Specifies the zero-based index of the first icon to extract. For
+    ///         example, if this value is zero, the function extracts the first
+    ///         icon in the specified file.
+    ///     </para>
+    ///     <para>
+    ///         If this value is <20>1 and <paramrefname="phiconLarge"/> and
+    ///         <paramrefname="phiconSmall"/> are both NULL, the function returns
+    ///         the total number of icons in the specified file. If the file is an
+    ///         executable file or DLL, the return value is the number of
+    ///         RT_GROUP_ICON resources. If the file is an .ico file, the return
+    ///         value is 1. 
+    ///     </para>
+    ///     <para>
+    ///         Windows 95/98/Me, Windows NT 4.0 and later: If this value is a 
+    ///         negative number and either <paramrefname="phiconLarge"/> or 
+    ///         <paramrefname="phiconSmall"/> is not NULL, the function begins by
+    ///         extracting the icon whose resource identifier is equal to the
+    ///         absolute value of <paramrefname="nIconIndex"/>. For example, use -3
+    ///         to extract the icon whose resource identifier is 3. 
+    ///     </para>
+    /// </param>
+    /// <param name="phIconLarge">
+    ///     An array of icon handles that receives handles to the large icons
+    ///     extracted from the file. If this parameter is NULL, no large icons
+    ///     are extracted from the file.
+    /// </param>
+    /// <param name="phIconSmall">
+    ///     An array of icon handles that receives handles to the small icons
+    ///     extracted from the file. If this parameter is NULL, no small icons
+    ///     are extracted from the file. 
+    /// </param>
+    /// <param name="nIcons">
+    ///     Specifies the number of icons to extract from the file. 
+    /// </param>
+    /// <returns>
+    ///     If the <paramrefname="nIconIndex"/> parameter is -1, the
+    ///     <paramrefname="phIconLarge"/> parameter is NULL, and the
+    ///     <paramrefname="phiconSmall"/> parameter is NULL, then the return
+    ///     value is the number of icons contained in the specified file.
+    ///     Otherwise, the return value is the number of icons successfully
+    ///     extracted from the file. 
+    /// </returns>
+    [DllImport("Shell32", CharSet = CharSet.Auto)]
+    public static extern int ExtractIconEx([MarshalAs(UnmanagedType.LPTStr)] string lpszFile, int nIconIndex, nint[] phIconLarge, nint[] phIconSmall, int nIcons);
+
+    [DllImport("shell32.dll")]
+    public static extern nint SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbSizeFileInfo, uint uFlags);
+
+}