c#怎么实现一个替换exe图标的功能,如qq.exe图标替换成酷狗的ico。

发布网友发布时间：2022-07-10 14:07

共1个回答

热心网友时间：2023-10-14 06:10

using System;
using System.IO;
using System.Runtime.InteropServices;

namespace ConsoleApplication2
{
    struct ICONDIRENTRY
    {
        byte bWidth;
        byte bHeight;
        byte bColorCount;
        byte bReserved;
        short wPlanes;
        short wBitCount;
        public int dwBytesInRes;
        public int dwImageOffset;
    };

    struct ICONDIR
    {
        short idReserved;
        short idType;
        public short idCount;
        //ICONDIRENTRY idEntries;
    };

    struct GRPICONDIRENTRY
    {
        byte bWidth;
        byte bHeight;
        byte bColorCount;
        byte bReserved;
        short wPlanes;
        short wBitCount;
        int dwBytesInRes;
        public short nID;
    };

    struct GRPICONDIR
    {
        public short idReserved;
        public short idType;
        public short idCount;
        public GRPICONDIRENTRY idEntries;
    };

    class Program
    {
        [DllImport("kernel32.dll")]
        public static extern IntPtr BeginUpdateResourceW([In] [MarshalAs(UnmanagedType.LPWStr)] string pFileName, [MarshalAs(UnmanagedType.Bool)] bool bDeleteExistingResources);

        [DllImport("kernel32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern unsafe bool UpdateResourceW([In] IntPtr hUpdate, [In]  char* lpType, [In]  char* lpName, ushort wLanguage, [In] IntPtr lpData, uint cb);

        [DllImport("kernel32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool EndUpdateResourceW([In] IntPtr hUpdate, [MarshalAs(UnmanagedType.Bool)] bool fDiscard);

        public static T ToStruct<T>(byte[] bytes, int index) where T : struct
        {
            int size = Marshal.SizeOf(typeof(T));
            IntPtr buffer = Marshal.AllocHGlobal(size);
            try
            {
                Marshal.Copy(bytes, index, buffer, size);
                return (T)Marshal.PtrToStructure(buffer, typeof(T));
            }
            finally
            {
                Marshal.FreeHGlobal(buffer);
            }
        }

        public static unsafe void Main(string[] args)
        {
            var exe = @"f:\SkypeSetup.exe";
            var ico = "f:\\1.ico";

            var RT_ICON = 3;
            var DIFFERENCE = 11;
            var RT_GROUP_ICON = (RT_ICON + DIFFERENCE);
            var p = BeginUpdateResourceW(exe, false);
            var ico2 = File.ReadAllBytes(ico);
            var stID = ToStruct<ICONDIR>(ico2, 0);
            var stIDE = ToStruct<ICONDIRENTRY>(ico2, Marshal.SizeOf(typeof(ICONDIR)));
            var nSize = stIDE.dwBytesInRes;
            var pIcon = Marshal.AllocHGlobal(nSize);
            Marshal.Copy(ico2, stIDE.dwImageOffset, pIcon, nSize);
            var stGID = new GRPICONDIR();
            stGID.idCount = stID.idCount;
            stGID.idReserved = 0;
            stGID.idType = 1;
            stGID.idEntries = ToStruct<GRPICONDIRENTRY>(ico2, Marshal.SizeOf(typeof(ICONDIR)));
            stGID.idEntries.nID = 0;

            var nGSize = Marshal.SizeOf(typeof(GRPICONDIR));
            var pGrpIcon = Marshal.AllocHGlobal(nGSize);
            Marshal.StructureToPtr(stGID, pGrpIcon, false);
            var b = UpdateResourceW(p, (char*)RT_GROUP_ICON, (char*)1, 0, pGrpIcon, (uint)nGSize);
            b = UpdateResourceW(p, (char*)RT_ICON, (char*)1, 0, pIcon, (uint)nSize);

            EndUpdateResourceW(p, false);
            Marshal.FreeHGlobal(pIcon);
        }
    }
}
需要用到不安全代码