[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, StringBuilder lParam);
public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, StringBuilder lParam);
SendMessage(你要设置的控件句柄,0x000C, _TextString.Length, _TextString);
不过SendMessage是传递消息,但对我来说,接收消息的那个程序不能改的
现在考虑是模拟键盘输入