Изменил определение структуры по вашей рекомендации и добавил функции чтения памяти из другого процесса.
В итоге структура заполняется, но к сожалению названия значков я так и не вижу :-( - поля "pszText" и "cchText" всегда равны нулю, остальные поля структуры успешно заполняются, а explorer больше не валится. Привожу полный код класса:
| Код |
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace SingleInst2 {
static class WinApi {
public const uint TBIF_IMAGE = 0x0001;
public const uint TBIF_TEXT = 0x0002;
public const uint TBIF_STATE = 0x0004;
public const uint TBIF_STYLE = 0x0008;
public const uint TBIF_LPARAM = 0x0010;
public const uint TBIF_COMMAND = 0x0020;
public const uint TBIF_SIZE = 0x0040;
public const uint TBIF_BYINDEX = 0x80000000;
const uint WM_USER = 1024;
const uint TB_HIDEBUTTON = (WM_USER + 4);
const uint TB_BUTTONCOUNT = (WM_USER + 24);
const uint TB_GETBUTTON = (WM_USER + 23);
const uint TB_GETITEMRECT = (WM_USER + 29);
const uint TB_DELETEBUTTON = (WM_USER + 22);
const uint TB_GETBUTTONTEXT = (WM_USER + 45);
const uint TBSTATE_HIDDEN = 0x08;
const uint PROCESS_ALL_ACCESS = 0x1F0FFF;
const uint MEM_COMMIT = 0x1000;
const uint MEM_RELEASE = 0x8000;
const uint PAGE_READWRITE = 0x04;
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct TBBUTTONINFO {
public int cbSize;
public int dwMask;
public int idCommand;
public int iImage;
public byte fsState;
public byte fsStyle;
public short cx;
public IntPtr lParam;
public IntPtr pszText;
public int cchText;
}
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool RedrawWindow(IntPtr hWnd, IntPtr lprcUpdate,
IntPtr hrgnUpdate, uint flags);
public static readonly int WM_SHOWFIRSTINSTANCE = RegisterWindowMessage("WM_SHOWFIRSTINSTANCE");
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, int wParam, bool lParam);
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, int wParam, IntPtr lParam);
[DllImport("user32")]
public static extern bool PostMessage(IntPtr hwnd, int msg, IntPtr wparam, IntPtr lparam);
[DllImport("user32")]
public static extern int RegisterWindowMessage(string message);
[DllImport("user32.dll")]
public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
[DllImport("user32.dll")]
public static extern bool SetForegroundWindow(IntPtr hWnd);
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern IntPtr OpenProcess(uint dwDesiredAccess, Int32 bInheritHandle, Int32 dwProcessId);
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress, Int32 dwSize, uint flAllocationType, uint flProtect);
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern Int32 VirtualFreeEx(IntPtr hProcess, IntPtr lpAddress, Int32 dwSize, uint dwFreeType);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern Int32 GetWindowThreadProcessId(IntPtr hWnd, out Int32 lpdwProcessId);
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern Int32 CloseHandle(IntPtr hObject);
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern Int32 ReadProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, [In, Out] byte[] lpBuffer, Int32 nSize, out Int32 lpNumberOfBytesRead);
public static void ShowToFront(string windowName) {
IntPtr window = FindWindow(null, windowName);
ShowWindow(window, 1);
SetForegroundWindow(window);
}
public static void ShowTaskbarButtons(bool showButtons) {
IntPtr hTrayWnd = GetNotifyWindow();
int count = (int)SendMessage(hTrayWnd, TB_BUTTONCOUNT, IntPtr.Zero, IntPtr.Zero);
Int32 dwTrayProcessID = -1;
// получаем ID процесса таскбара
GetWindowThreadProcessId(hTrayWnd, out dwTrayProcessID);
if (dwTrayProcessID <= 0) { return; }
TBBUTTONINFO tbbi = new TBBUTTONINFO();
// открываем процесс на чтение\запись
IntPtr hTrayProc = OpenProcess(PROCESS_ALL_ACCESS, 0, dwTrayProcessID);
if (hTrayProc == IntPtr.Zero) { return; }
Int32 dwBytesRead = -1;
byte[] byteBuffer = new byte[Marshal.SizeOf(tbbi.GetType())];
// создаем переменную в другом процессе
IntPtr lpData = VirtualAllocEx(hTrayProc, IntPtr.Zero, Marshal.SizeOf(tbbi.GetType()), MEM_COMMIT, PAGE_READWRITE);
if (lpData == IntPtr.Zero) { CloseHandle(hTrayProc); return; }
for (int i = 0; i < count; i++) {
SendMessage(hTrayWnd, TB_GETBUTTON, i, lpData);
// Читаем данные из другого процесса
ReadProcessMemory(hTrayProc, lpData, byteBuffer, Marshal.SizeOf(tbbi.GetType()), out dwBytesRead);
if (dwBytesRead < Marshal.SizeOf(tbbi.GetType())) { continue; }
IntPtr ptrOut = Marshal.AllocHGlobal(Marshal.SizeOf(tbbi.GetType()));
Marshal.Copy(byteBuffer, 0, ptrOut, byteBuffer.Length);
// Получаем данные в структуру
tbbi = (TBBUTTONINFO)Marshal.PtrToStructure(ptrOut, typeof(TBBUTTONINFO));
}
VirtualFreeEx(hTrayProc, lpData, 0, MEM_RELEASE);
CloseHandle(hTrayProc);
}
}
}
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В отладчике на 142 строке у меня установлен breakpoint и я вижу что поля tbbi.pszText и tbbi.cchText в процессе прохождения цикла остаются неизменными. |