public static string GetItemText(IntPtr hwnd, int item, int subItem)
{
using (var hProcess = new RemoteProcessHandle(hwnd))
{
int offset = hProcess.Is32Bit ? Marshal.SizeOf(typeof(LVITEM32)) : Marshal.SizeOf(typeof(LVITEM64));
int cbSize = (MAX_LVMSTRING + 1) * 2;
using (var remoteMem = new RemoteMemoryHandle(hProcess, offset + cbSize))
{
if (hProcess.Is32Bit)
{
var lvitem = new LVITEM32();
lvitem.mask = LVIF_TEXT;
lvitem.pszText = (uint)(remoteMem.Address + offset);
lvitem.cchTextMax = MAX_LVMSTRING;
lvitem.iItem = item;
lvitem.iSubItem = subItem;
remoteMem.WriteTo(ref lvitem);
}
else
{
var lvitem = new LVITEM64();
lvitem.mask = LVIF_TEXT;
lvitem.pszText = (ulong)(remoteMem.Address + offset);
lvitem.cchTextMax = MAX_LVMSTRING;
lvitem.iItem = item;
lvitem.iSubItem = subItem;
remoteMem.WriteTo(ref lvitem);
}
bool isUnicode = IsWindowUnicode(hwnd);
int LVM_GETITEMTEXT = isUnicode ? LVM_GETITEMTEXTW : LVM_GETITEMTEXTA;
IntPtr result = SendMessage(hwnd, LVM_GETITEMTEXT, new IntPtr(item), remoteMem.Address);
if (result == IntPtr.Zero)
{
throw new Win32Exception();
}
using (var m = new CoTaskMem(cbSize))
{
remoteMem.ReadFrom(m.Address, offset, cbSize);
if (isUnicode)
{
return(Marshal.PtrToStringUni(m.Address));
}
else
{
return(Marshal.PtrToStringAnsi(m.Address));
}
}
}
}
}
public RemoteMemoryHandle(RemoteProcessHandle hProcess, int cbSize) : base(true)
{
_processHandle = hProcess;
SetHandle(VirtualAllocEx(_processHandle, IntPtr.Zero, new IntPtr((uint)cbSize), MEM_COMMIT, PAGE_READWRITE));
}
private static extern bool ReadProcessMemory(
RemoteProcessHandle hProcess,
IntPtr lpBaseAddress,
IntPtr lpBuffer,
IntPtr dwSize,
out IntPtr lpNumberOfBytesRead);
private static extern bool WriteProcessMemory(
RemoteProcessHandle hProcess,
IntPtr lpBaseAddress,
IntPtr lpBuffer,
IntPtr nSize,
out IntPtr lpNumberOfBytesWritten);
private static extern bool VirtualFreeEx(RemoteProcessHandle hProcess, IntPtr address, IntPtr size, int freeType);
private static extern IntPtr VirtualAllocEx(RemoteProcessHandle hProcess, IntPtr address, IntPtr size, int allocationType, int protect);