桌面图标操作 - 当启用带有图片旋转的主题时如何获取 SysListView32 的句柄

Question

我正在尝试在桌面上移动图标，一切正常，直到选择具有图片旋转的主题。对于基本的 Windows 7 主题，SysListView32 是 SHELLDLL_DefView 的子级，而 SHELLDLL_DefView 又是 Progman 的子级。

但是，当选择图片旋转桌面主题时，SysListView32 会成为 SHELLDLL_DefView 的子级，而 SHELLDLL_DefView 又会成为 WorkerW 的子级。不止 1 个。我应该如何找到指向正确 WorkerW 的正确 HWND。枚举所有桌面窗口并使用类名 WorkerW 检查每个桌面窗口？

[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr GetWindow(IntPtr hWnd, GetWindow_Cmd uCmd);
[DllImport("user32.DLL")]
public static extern IntPtr FindWindowEx(IntPtr hwndParent,IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

enum GetWindow_Cmd : uint
{
    GW_HWNDFIRST = 0,
    GW_HWNDLAST = 1,
    GW_HWNDNEXT = 2,
    GW_HWNDPREV = 3,
    GW_OWNER = 4,
    GW_CHILD = 5,
    GW_ENABLEDPOPUP = 6
}

例如，在我的 main() 中，我进行以下调用：

IntPtr HWND = FindWindow("Progman",null);
HWND = GetWindow(HWND, GetWindow_Cmd.GW_CHILD);
HWND = GetWindow(HWND, GetWindow_Cmd.GW_CHILD);

Answer 1

非常感谢 Hans 在他的机器上尝试了这个，也感谢 Sertac 告诉我 SysListView32 将父级从“Progman”更改为“WorkerW”类名。我的解决方案是首先尝试在 Progman 的子级中找到 SysListView32：

       hwndIcon = NativeMethods.FindWindow("Progman", null);
       hwndIcon = NativeMethods.FindWindowEx(hwndIcon, IntPtr.Zero, "SHELLDLL_DefView", null);
       hwndIcon = NativeMethods.FindWindowEx(hwndIcon, IntPtr.Zero, "SysListView32", "FolderView");

如果 hwndIcon 返回 IntPtr.Zero，我尝试枚举桌面下的所有窗口，然后找到类名为“WorkerW”的窗口（我在委托 GetSysListViewContainer(.. .））在后者中，我找到了“唯一的一个”，即。有孩子的人。这是包含 SHELLDLL_DefView 的那个，它本身包含 SysListView32，它本身包含桌面上每个图标的句柄：

       hwndIcon = NativeMethods.FindWindow("Progman", null);
       hwndIcon = NativeMethods.FindWindowEx(hwndIcon, IntPtr.Zero, "SHELLDLL_DefView", null);
       hwndIcon = NativeMethods.FindWindowEx(hwndIcon, IntPtr.Zero, "SysListView32", "FolderView");

       if (hwndIcon == IntPtr.Zero)
        {
            IntPtr hDesktop = NativeMethods.GetDesktopWindow();
            IntPtr hwnd = IntPtr.Zero;
            EnumWindowsProc ewp = new EnumWindowsProc(GetSysListViewContainer);
            EnumWindows(ewp, 0);
            hwndIcon = NativeMethods.FindWindowEx(hwndIcon, IntPtr.Zero, "SHELLDLL_DefView", null);
            hwndIcon = NativeMethods.FindWindowEx(hwndIcon, IntPtr.Zero, "SysListView32", "FolderView");
        }

通过以下命令，我得到了桌面图标计数：

       int vItemCount = NativeMethods.SendMessage(hwndIcon, LVM_GETITEMCOUNT, 0, 0);
       string vText;
       int vProcessId = 0;

通过这个我循环了所有图标：

        NativeMethods.GetWindowThreadProcessId(hwndIcon, ref vProcessId);
        IntPtr vProcess = NativeMethods.OpenProcess(PROCESS_VM_OPERATION | PROCESS_VM_READ | PROCESS_VM_WRITE, false, vProcessId);
        IntPtr foo = IntPtr.Zero;
        IntPtr vPointer = NativeMethods.VirtualAllocEx(vProcess, IntPtr.Zero, sizeof(uint), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

            for (int j = 0; j < vItemCount; j++)
            {
                byte[] vBuffer = new byte[256];
                LVITEM[] vItem = new LVITEM[1];
                vItem[0].mask = LVIF_TEXT;
                vItem[0].iItem = j;
                vItem[0].iSubItem = 0;
                vItem[0].cchTextMax = vBuffer.Length;
                vItem[0].pszText = (IntPtr)((int)vPointer + Marshal.SizeOf(typeof(LVITEM)));
                uint vNumberOfBytesRead = 0;
                WriteProcessMemory(vProcess, vPointer, Marshal.UnsafeAddrOfPinnedArrayElement(vItem, 0), Marshal.SizeOf(typeof(LVITEM)), ref vNumberOfBytesRead);
                SendMessage(hwndIcon, LVM_GETITEMW, j, vPointer.ToInt32());
                ReadProcessMemory(vProcess, (IntPtr)((int)vPointer + Marshal.SizeOf(typeof(LVITEM))), Marshal.UnsafeAddrOfPinnedArrayElement(vBuffer, 0), vBuffer.Length, out vNumberOfBytesRead);

                // Get the name of the Icon
                vText = Encoding.Unicode.GetString(vBuffer, 0, (int)vNumberOfBytesRead);

                // Get  Icon location
                SendMessage(hwndIcon, LVM_GETITEMPOSITION, j, vPointer.ToInt32());
                Point[] vPoint = new Point[1];
                foo = Marshal.UnsafeAddrOfPinnedArrayElement(vPoint, 0);
                ReadProcessMemory(vProcess, vPointer, Marshal.UnsafeAddrOfPinnedArrayElement(vPoint, 0), Marshal.SizeOf(typeof(Point)), out vNumberOfBytesRead);

               //and ultimaely move icon.
               SendMessage(hwndIcon, LVM_SETITEMPOSITION, j, lParam[0]);

所以回顾一下，我需要找出为什么我无法获取所有桌面图标都存储在 Windows 中的列表视图容器的句柄。当没有背景旋转时，我的原始代码运行良好，但在有背景旋转时无法获取ListSysView32的句柄。

.Net 有没有更好的方法来做到这一点？
千焦

Answer 2

这是获取 SysListView32 处理程序的丑陋而简单的方法（C++ 代码）

HWND hWndLV = ::GetShellWindow();
hWndLV = ::GetNextWindow( ::GetNextWindow(hWndLV, GW_HWNDPREV), GW_HWNDPREV);
hWndLV = ::GetFirstChild(hWndLV);
hWndLV = ::GetNextWindow(hWndLV, GW_HWNDNEXT);
hWndLV = ::GetFirstChild(hWndLV);