C# user32.dll 找窗口 填数据

工具：SpyLite

 [DllImport("user32.dll", EntryPoint = "FindWindow")]
         private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);//常用来查找最上级窗口

         [DllImport("user32.dll", EntryPoint = "FindWindowEx")]
         private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);//最适合使用【按类型查找】来找到目标填充栏

         [DllImport("user32.dll", EntryPoint = "SendMessageA")]
         private static extern int SendMessageA(IntPtr hwnd, int wMsg, IntPtr wParam, string lParam);//向目标填充栏 填充文本（有时候目标有【仅数字】之类的限制，这时候发不符合的文本就不行了）

         [DllImport("user32.dll", SetLastError = true)]
         static extern IntPtr GetWindow(IntPtr hWnd, GetWindow_Cmd uCmd);//类似树结构的查找方式，实测中GW_HWNDNEXT经常找不着，鼠标划过一下目标，又找着了......
         const int WM_SETTEXT = 0x000C;
         enum GetWindow_Cmd : uint
         {
             GW_HWNDFIRST = ,
             GW_HWNDLAST = ,
             GW_HWNDNEXT = ,
             GW_HWNDPREV = ,
             GW_OWNER = ,
             GW_CHILD = ,
             GW_ENABLEDPOPUP =
         }

　　

 string msg = "";
             IntPtr hMainWnd = FindWindow(null, "父窗口名");//此处有待修改，父窗口类型和标题，那个唯一的可能性更大就用哪个
             IntPtr hNextWnd;
             IntPtr hLastWnd;
             if (hMainWnd != IntPtr.Zero)
             {

                 //子 hKPfameWnd
                 hNextWnd = FindWindowEx(hMainWnd, IntPtr.Zero, null, "FPtiankai_new");
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-1没找到";

                     return msg;

                 }
                 hLastWnd = hNextWnd;

                 //向下找两层
                 for (int i = ; i < ; i++)
                 {
                     hNextWnd = FindWindowEx(hLastWnd, IntPtr.Zero, "WindowsForms10.Window.8.app.0.3598b65_r16_ad1", null);
                     if (IntPtr.Zero == hNextWnd)
                     {
                         msg = "SetValueGolden = ::FindWindowEx-2没找到";

                         return msg;
                     }
                     hLastWnd = hNextWnd;
                 }

                 hNextWnd = GetWindow(hLastWnd, GetWindow_Cmd.GW_CHILD);//返回其第一个子窗体
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-3没找到";
                     return msg;
                 }
                 hLastWnd = hNextWnd;

                 /*此时的窗口布局如下
                 3541882   WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:北京                    这是刚刚找到的
                 4853516   WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:北  京
                 1513288   WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:ddd
                 4919418   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:
                 4000606   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:
                 1443834   WindowsForms10.EDIT.app.0.3598b65_r16_ad1           标题:
                 1181678   WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:￥0.00
                 22088970  WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:零圆整
                 10817716  WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:￥0.00
                 1247228   WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:￥0.00
                 5969752   WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:2017年08月08日
                 10425028  WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:08919001
                 920118    WindowsForms10.STATIC.app.0.3598b65_r16_ad1             标题:1100164320
                 4852040   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:
                 788912    WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:
                 1706660   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:
                 5179046   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:
                 3018896   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:
                 5444734   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:           子窗口——WindowsForms10.EDIT.app.0.3598b65_r16_ad1——目标【1】
                 24187592  WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:           同上——目标【2】
                 985234    WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:           同上——目标【3】
                 5965524   WindowsForms10.Window.8.app.0.3598b65_r16_ad1               标题:              同上——目标【4】
                                 */

                 //同一层找接下来18个控件
                 for (int i = ; i < ; i++)
                 {

                     hNextWnd = GetWindow(hLastWnd, GetWindow_Cmd.GW_HWNDNEXT);//找的是NEXT
                     if (IntPtr.Zero == hNextWnd)
                     {
                         msg = "SetValueGolden = ::FindWindowEx-i="+i+"没找到";
                         return msg;
                     }
                     hLastWnd = hNextWnd;
                 }
                 //【hLastWnd不更新 】

                 //目标1
                 hNextWnd = FindWindowEx(hLastWnd, IntPtr.Zero, "WindowsForms10.EDIT.app.0.3598b65_r16_ad1", null);
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-目标1";
                     return msg;
                 }
                 SendMessageA(hNextWnd, WM_SETTEXT, IntPtr.Zero, info.Bank + " " + info.BankAccount);

                 //hLastWnd再更新
                 hNextWnd = GetWindow(hLastWnd, GetWindow_Cmd.GW_HWNDNEXT);
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-4没找到";
                     return msg;
                 }
                 hLastWnd = hNextWnd;
                 //目标2
                 hNextWnd = FindWindowEx(hLastWnd, IntPtr.Zero, "WindowsForms10.EDIT.app.0.3598b65_r16_ad1", null);
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-目标2";
                     return msg;
                 }
                 SendMessageA(hNextWnd, WM_SETTEXT, IntPtr.Zero, info.TaxpayerCode);

                 //hLastWnd再更新
                 hNextWnd = GetWindow(hLastWnd, GetWindow_Cmd.GW_HWNDNEXT);
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-5没找到";
                     return msg;
                 }
                 hLastWnd = hNextWnd;
                 //目标3
                 hNextWnd = FindWindowEx(hLastWnd, IntPtr.Zero, "WindowsForms10.EDIT.app.0.3598b65_r16_ad1", null);
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-目标3";
                     return msg;
                 }
                 SendMessageA(hNextWnd, WM_SETTEXT, IntPtr.Zero, info.Address + " " + info.Telephone);

                 //hLastWnd再更新
                 hNextWnd = GetWindow(hLastWnd, GetWindow_Cmd.GW_HWNDNEXT);
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-6没找到";
                     return msg;
                 }
                 hLastWnd = hNextWnd;
                 //目标4
                 hNextWnd = FindWindowEx(hLastWnd, IntPtr.Zero, "WindowsForms10.EDIT.app.0.3598b65_r16_ad1", null);
                 if (IntPtr.Zero == hNextWnd)
                 {
                     msg = "SetValueGolden = ::FindWindowEx-目标4";
                     return msg;
                 }
                 SendMessageA(hNextWnd, WM_SETTEXT, IntPtr.Zero, info.TaxpayerName);

             }
             else
             {
                 msg = "没有找到目标软件";
                 return msg;
             }

实测：FindWindowEx 比 GetWindow靠谱，查找文本框等需要填充的控件，尽量使用FindWindowEx按窗体类型查找