VC获取窗口句柄！求大神解惑！

程序中调用另一个窗口的控件单击等操作
1.使用spy++等工具检测窗格布局如下：
[桌面Desktop]
--1窗格“有信”
----2窗格“”
--------3窗格“”
----------------4窗格“”
---------------------按钮1
---------------------按钮2
---------------------...(所需要获取的16个控件)
----------------4窗格"UXTab"
--------3窗格“”
--7个按钮
--------3窗格“”
--四个子窗格

2.使用GW_CHILD、GW_HWNDNEXT获取窗口句柄（但与spy++中显示的层次结构不一样）

hMain = (HWND)FindWindow(NULL, L"有信");

	//SendMessage(hMain, WM_CLOSE, 0, 0);  //居然关闭不了 汗= =！

	//DestroyWindow(hMain); 



	HWND hChild = GetWindow(hMain,GW_CHILD);//""	3个有效句柄

	HWND step0_1 = GetWindow(hChild,GW_HWNDFIRST);

	HWND step0_2 = GetWindow(step0_1,GW_HWNDNEXT);

	HWND step0_3 = GetWindow(step0_2,GW_HWNDNEXT);



	HWND hChild1 = GetWindow(hChild,GW_CHILD);//"" "" ""	4个有效句柄

	HWND step1_1 = GetWindow(hChild1,GW_HWNDFIRST);

	HWND step1_2 = GetWindow(step1_1,GW_HWNDNEXT);

	HWND step1_3 = GetWindow(step1_2,GW_HWNDNEXT);

	HWND step1_4 = GetWindow(step1_3,GW_HWNDNEXT);

	HWND step1_5 = GetWindow(step1_4,GW_HWNDNEXT);

	

	HWND hChild2 = GetWindow(hChild1,GW_CHILD);//"" "UXTab"	2	8个有效句柄

	HWND step2_1 = GetWindow(hChild2,GW_HWNDFIRST);

	HWND step2_2 = GetWindow(step2_1,GW_HWNDNEXT);

	HWND step2_3 = GetWindow(step2_2,GW_HWNDNEXT);

	HWND step2_4 = GetWindow(step2_3,GW_HWNDNEXT);

	HWND step2_5 = GetWindow(step2_4,GW_HWNDNEXT);

	HWND step2_6 = GetWindow(step2_5,GW_HWNDNEXT);

	HWND step2_7 = GetWindow(step2_6,GW_HWNDNEXT);

	HWND step2_8 = GetWindow(step2_7,GW_HWNDNEXT);

	HWND step2_9 = GetWindow(step2_8,GW_HWNDNEXT);

	HWND step2_10 = GetWindow(step2_9,GW_HWNDNEXT);

	HWND step2_11 = GetWindow(step2_10,GW_HWNDNEXT);

	HWND step2_12 = GetWindow(step2_11,GW_HWNDNEXT);

	HWND step2_13 = GetWindow(step2_12,GW_HWNDNEXT);

	HWND step2_14 = GetWindow(step2_13,GW_HWNDNEXT);

	HWND step2_15 = GetWindow(step2_14,GW_HWNDNEXT);

	HWND step2_16 = GetWindow(step2_15,GW_HWNDNEXT);

	HWND step2_17 = GetWindow(step2_16,GW_HWNDNEXT);

	HWND step2_18 = GetWindow(step2_17,GW_HWNDNEXT);



	HWND hChild3 = GetWindow(hChild2,GW_CHILD);//"" * 16	1个有效句柄

	HWND step3_1 = GetWindow(hChild3,GW_HWNDFIRST);

	HWND step3_2 = GetWindow(step3_1,GW_HWNDNEXT);

	HWND step3_3 = GetWindow(step3_2,GW_HWNDNEXT);

	HWND step3_4 = GetWindow(step3_3,GW_HWNDNEXT);

	HWND step3_5 = GetWindow(step3_4,GW_HWNDNEXT);

	HWND step3_6 = GetWindow(step3_5,GW_HWNDNEXT);

	HWND step3_7 = GetWindow(step3_6,GW_HWNDNEXT);

	HWND step3_8 = GetWindow(step3_7,GW_HWNDNEXT);

	HWND step3_9 = GetWindow(step3_8,GW_HWNDNEXT);

	HWND step3_10 = GetWindow(step3_9,GW_HWNDNEXT);

	HWND step3_11 = GetWindow(step3_10,GW_HWNDNEXT);

	HWND step3_12 = GetWindow(step3_11,GW_HWNDNEXT);

	HWND step3_13 = GetWindow(step3_12,GW_HWNDNEXT);

	HWND step3_14 = GetWindow(step3_13,GW_HWNDNEXT);

	HWND step3_15 = GetWindow(step3_14,GW_HWNDNEXT);

	HWND step3_16 = GetWindow(step3_15,GW_HWNDNEXT);

请大家指导或提供思路，谢谢大家！新年快乐~