[C#] 纯文本查看 复制代码#region Win32 API 方法

#region SendMessage 重载

[DllImport("user32.dll", CharSet = CharSet.Unicode)]

private static extern bool SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, StringBuilder lParam);

[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]

private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wparam, IntPtr lparam);

[DllImport("user32.dll", CharSet = CharSet.Unicode)]

private static extern int SendMessage(IntPtr hWnd, uint Msg, out int wParam, out int lParam);

#endregion

private const uint WM_GETTEXTLENGTH = 0x000E;

private const uint WM_GETTEXT = 0x000D;

private const uint EM_GETSEL = 0xB0;

[DllImport("user32.dll", ExactSpelling = true)]

private static extern IntPtr GetForegroundWindow();

[DllImport("user32.dll", ExactSpelling = true)]

private static extern IntPtr GetFocus();

[DllImport("user32.dll", SetLastError = true)]

private static extern int GetWindowThreadProcessId(int handle, out int processId);

[DllImport("user32", SetLastError = true, ExactSpelling = true)]

private static extern int AttachThreadInput(int idAttach, int idAttachTo, bool fAttach);

[DllImport("kernel32.dll")]

private static extern int GetCurrentThreadId();

#endregion

private string GetTextFromWin32Api()

{

//获取活动窗口的控件hWnd

int activeWinPtr = GetForegroundWindow().ToInt32();

int activeThreadId = 0;

int processId;

activeThreadId = GetWindowThreadProcessId(activeWinPtr, out processId);

int currentThreadId = GetCurrentThreadId();

if (activeThreadId != currentThreadId)

AttachThreadInput(activeThreadId, currentThreadId, true);

IntPtr activeCtrlId = GetFocus();

//获取全部文本长度

int textlength = (int)SendMessage(activeCtrlId, WM_GETTEXTLENGTH, IntPtr.Zero, IntPtr.Zero) + 1;

//Have any text at all?

if (textlength > 0)

{

//Get selection

int selstart;

int selend;

SendMessage(activeCtrlId, EM_GETSEL, out selstart, out selend);

StringBuilder sb = new StringBuilder(textlength);

SendMessage(activeCtrlId, WM_GETTEXT, (IntPtr)textlength, sb);

//Slice out selection

string value = sb.ToString();

sb.Clear();

if ((value.Length > 0) && (selend - selstart > 0) && (selstart < value.Length) && (selend < value.Length))

return value.Substring(selstart, selend - selstart);

}

//失败返回null

return null;

}