c# 用 win32 api treeview 遍历
我想获取treeview所有节点的文本
现在有两个问题:
1 GetItemText 获得的文本全是乱码
2 遍历不能获得所有的节点 应该是有逻辑错误

C# code

        public  void  Bianli(IntPtr Root,IntPtr TreeViewHwnd)        {            IntPtr XD = GetNextItem(TreeViewHwnd, Root);            if (!XD.Equals(IntPtr.Zero))  //当前节点是否有兄弟节点                Bianli(XD, TreeViewHwnd);            IntPtr CHILD = GetCHILDItem(TreeViewHwnd, Root);            if (!CHILD.Equals(IntPtr.Zero))  //当前节点是否有子节点                Bianli(TreeViewHwnd, CHILD);            s += GetItemText(TreeViewHwnd, Root);        }        //获取下一个同级节点        public static IntPtr GetNextItem(IntPtr TreeViewHwnd, IntPtr PrevHwnd)        {            int mbHwnd = 0;            mbHwnd = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_NEXT), PrevHwnd);            return new IntPtr(mbHwnd);        }        //获取第一个子节点        public static IntPtr GetCHILDItem(IntPtr TreeViewHwnd, IntPtr PrevHwnd)        {            int mbHwnd = 0;            mbHwnd = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_CHILD), PrevHwnd);            return new IntPtr(mbHwnd);        }        //获取指定项文本        public static string GetItemText(IntPtr TreeViewHwnd, IntPtr ItemHwnd)        {            IntPtr hStr = Marshal.AllocHGlobal(1024);            TVITEM tv = new TVITEM();            tv.hItem = ItemHwnd;            tv.mask = TVIF_TEXT;            tv.pszText = hStr;            tv.cchTextMax = 1024;            StringBuilder sb = new StringBuilder(1024);            int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETITEM, new IntPtr(0), tv);            int iCopy = CopyMemory(sb, hStr, 1024);            Marshal.FreeHGlobal(hStr);            return sb.ToString();        }

C# code

public static string GetItemText(IntPtr TreeViewHwnd, IntPtr ItemHwnd){    string output = string.Empty;    uint vProcessId;    /* WINAPI */ GetWindowThreadProcessId(TreeViewHwnd, out vProcessId);    IntPtr vProcess = /* WINAPI */ OpenProcess(        PROCESS_VM_OPERATION | PROCESS_VM_READ | PROCESS_VM_WRITE,        false,        vProcessId        );    IntPtr vPointer = /* WINAPI */ VirtualAllocEx(        vProcess,        IntPtr.Zero,        4096,        MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE        );    try    {        byte[] vBuffer = new byte[1024];        TVITEM[] vItem = new TVITEM[1];        vItem[0] = new TVITEM();        vItem[0].mask = TVIF_TEXT;        vItem[0].hItem = ItemHwnd;        vItem[0].pszText = (IntPtr)((int)vPointer + Marshal.SizeOf(typeof(TVITEM)));        vItem[0].cchTextMax = vBuffer.Length;        uint vNumberOfBytesRead = 0;        /* WINAPI */ WriteProcessMemory(            vProcess,            vPointer,            Marshal.UnsafeAddrOfPinnedArrayElement(vItem, 0),            (uint)Marshal.SizeOf(typeof(TVITEM)),            out vNumberOfBytesRead            );        SendMessage(TreeViewHwnd, TVM_GETITEMW, IntPtr.Zero, vPointer);        /* WINAPI */ ReadProcessMemory(            vProcess,            new IntPtr(vPointer.ToInt32() + Marshal.SizeOf(typeof(TVITEM))),             Marshal.UnsafeAddrOfPinnedArrayElement(vBuffer, 0),            (uint)vBuffer.Length,            out vNumberOfBytesRead            );        output = Marshal.PtrToStringAuto(Marshal.UnsafeAddrOfPinnedArrayElement(vBuffer, 0));    }    finally    {        /* WINAPI */ VirtualFreeEx(vProcess, vPointer, 0, MEM_RELEASE);        /* WINAPI */ CloseHandle(vProcess);    }    return output;}