获取任意进程的文本内容值

using System.Reflection;

[DllImport("user32.dll", EntryPoint="FindWindow")]
public static extern int FindWindow (
string lpClassName,
string lpWindowName
);

[DllImport("user32.dll", EntryPoint="FindWindowEx")]
public static extern int FindWindowEx (
int hWnd1,
int hWnd2,
string lpsz1,
string lpsz2
);

[DllImport("user32.dll", EntryPoint="SendMessage")]
public static extern int SendMessage (
int hwnd,
int wMsg,
int wParam,
System.Text.StringBuilder lParam
);

private void button1_Click(object sender, System.EventArgs e)
{
int hwnd = FindWindow("notepad", null);
hwnd = FindWindowEx(hwnd, 0, "Edit", null);
System.Text.StringBuilder str = new System.Text.StringBuilder(255);
SendMessage(hwnd, 0xD, str.Capacity, str);
MessageBox.Show(str.ToString());
}

 先获取所要窗口的句柄(你可用spy++查相关的参数)
然后用GetWindowText这个API函数