windwos.forms.sendkeys

Question

我在按钮用SENDKEYS.SEND()发送其它窗口时能发出键值，在自己程序里发现窗口为什么发不出键值？
代码：
   IntPtr hd = FindWindow("Internet Explorer_TridentDlgFrame", "修改密码 -- 网页对话框");
                                                if (hd != IntPtr.Zero) //修改密码失败
                                                {
                                                    
                                                    Rectangle rc = new Rectangle();
                                                    GetWindowRect(hd, ref rc);
                                                    SetWindowPos(hd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
                                                    Cursor.Position = new Point(rc.Left + 180, rc.Top + 50); //新密码
                                                    mouse_event(MouseEventFlag.LeftDown, 0, 0, 0, 0);
                                                    mouse_event(MouseEventFlag.LeftUp, 0, 0, 0, 0);
                                                    
                                                    System.Windows.Forms.SendKeys.Send(passw);                                                    System.Windows.Forms.SendKeys.Send("{TAB}");                                                    System.Windows.Forms.SendKeys.Send(passw);
                                                    
                                                    Cursor.Position = new Point(rc.Left + 140, rc.Top + 105);
                                                    mouse_event(MouseEventFlag.LeftDown, 0, 0, 0, 0);
                                                    mouse_event(MouseEventFlag.LeftUp, 0, 0, 0, 0);                                                }
麻烦高手帮忙查看下原码 其中passw是全程变量，有值。

Answer 1

SendKeys.Send貌似只能一个字符一个字符的发，不能发字符串。如果发字符串，你可以用
api : SendInput

Answer 2

SendKeys.Send可以发字符串，主要是现在的窗口是该程序的TIMER中网页弹出的，其它程序弹出的这窗口，要这代码正常。程序自己弹出的窗口就不行了！我试下api : SendInput

Answer 3

解决了，多发几次
  hd = FindWindow("Internet Explorer_TridentDlgFrame", "修改密码 -- 网页对话框");
                                                if (hd != IntPtr.Zero) //修改密码失败
                                                {
                                                  
                                                    Rectangle rc = new Rectangle();
                                                    GetWindowRect(hd, ref rc);
                                                    SetWindowPos(hd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
                                                    Cursor.Position = new Point(rc.Left + 180, rc.Top + 50); //新密码                                                    mouse_event(MouseEventFlag.LeftDown, 0, 0, 0, 0);
                                                    mouse_event(MouseEventFlag.LeftUp, 0, 0, 0, 0);                                                    SendKeys.Send(passw);                                                    SendKeys.Send("{TAB}");                                                    SendKeys.Send(passw);
                                                    k++;
                                                    if (k == 3)
                                                    {
                                                        Cursor.Position = new Point(rc.Left + 140, rc.Top + 105);
                                                        mouse_event(MouseEventFlag.LeftDown, 0, 0, 0, 0);
                                                        mouse_event(MouseEventFlag.LeftUp, 0, 0, 0, 0);
                                                        k = 0;
                                                        w_state++;
                                                    }
                                                }