FindWindow 找不到开始按钮，始终返回 NULL

[谁学逆向工程]

	while(true)
	{
	HWND h = FindWindow(_T("BUTTON"),_T("开始(&S)"));//这里加不加&符号都找不到
	if(h!=NULL)
		break;
	}

[jiht594]

BUTTON改成Button试试

[jiht594]

这函数看起来不查子窗口

Retrieves a handle to the top-level window whose class name and window name match the specified strings. This function does not search child windows. This function does not perform a case-sensitive search.

[谁学逆向工程]

引用 2 楼 jiht594 的回复:

这函数看起来不查子窗口 Retrieves a handle to the top-level window whose class name and window name match the specified strings. This function does not search child windows. This function does not perform a case-sensitive search.

想找到开始按钮，然后发送鼠标左键单击消息，用什么思路解决？

[棉猴]

MSDN上说了
Retrieves a handle to the top-level window whose class name and window name match the specified strings. This function does not search child windows. This function does not perform a case-sensitive search.
该函数不会搜索子窗口。按键控件属于格式化窗口的子窗口，所以FindWindow()函数不起作用。

[轻箬笠]

先用FindWindow获取主窗口的句柄。然后调用FindWindowEx获取按钮的句柄。
这里有个例子可以看下。

const int BM_CLICK = 0xF5;
IntPtr maindHwnd = FindWindow(null, "QQ用户登录"); //获得QQ登陆框的句柄
if (maindHwnd != IntPtr.Zero)
{
    IntPtr childHwnd = FindWindowEx(maindHwnd, IntPtr.Zero, null, "登录");   //获得按钮的句柄
    if (childHwnd != IntPtr.Zero)
    {
        SendMessage(childHwnd, BM_CLICK, 0, 0);     //发送点击按钮的消息
    }
    else
    {
        MessageBox.Show("没有找到子窗口");
    }
}
else
{
    MessageBox.Show("没有找到窗口");
}

原文地址https://www.cnblogs.com/easypass/p/4067484.html

[轻箬笠]

另外，发送点击消息好像是发给窗体的。用法如下：
::SendMessage(hWnd, WM_COMMAND, MAKEPARAM(BTN_ID, BN_CLICKED), 0);

[谁学逆向工程]

引用 4 楼 棉猴 的回复:

MSDN上说了 Retrieves a handle to the top-level window whose class name and window name match the specified strings. This function does not search child windows. This function does not perform a case-sensitive search. 该函数不会搜索子窗口。按键控件属于格式化窗口的子窗口，所以FindWindow()函数不起作用。

用 EnumChildWindows 找到了按钮，如果想给按钮发送鼠标左键单击消息，是应该发给按钮还是按钮的父窗口？

[孤必有邻]

向按钮发送BN_CLICKED命令
::SendMessage(hWndOK,WM_COMMAND,BN_CLICKED,0);

[棉猴]

引用 5 楼 谁学逆向工程 的回复:

[quote=引用 4 楼 棉猴 的回复:]
MSDN上说了
Retrieves a handle to the top-level window whose class name and window name match the specified strings. This function does not search child windows. This function does not perform a case-sensitive search.
该函数不会搜索子窗口。按键控件属于格式化窗口的子窗口，所以FindWindow()函数不起作用。

用 EnumChildWindows 找到了按钮，如果想给按钮发送鼠标左键单击消息，是应该发给按钮还是按钮的父窗口？[/quote]
应该发给按钮