1. 点击【开始】->【运行】 命令：regedit.

2. 定位到HKEY_LOCALMACHINE -> SOFTWARE -> Microsoft -> Internet Explorer -> Main

3. 在【右边区域】【右键】新建一个名称为TabProcGrowth的DWORD值, 数值数据设置为0.

VS不用重启，直接可以按F5进行调试ActiveX了！

参看：

网页中OCX控件HWND为空问题当网页中的OCX控件没有出现到屏幕上之前(或者尺寸为0时)，它的WM_CREATE消息将不会被调用. 这样当script程序调用一些必须要有有效HWND的操作时就会导致MFC/ATL底层库的崩溃(调试版本则会ASSERT)。 在MFC中的调试版本：

ASSERT(::IsWindow(m_hWnd)); 在ATL中的调试版本:

ATLASSERT(::IsWindow(m_hWnd)); MFC的解决办法是：在派生类中钩住OnSetClientSite，创建一个窗口，代码如下：// CMyControl is derived from COleControl.

void CMyControl::OnSetClientSite()

{

// It doesn't matter who the parent window is or what the size of

// the window is because the control's window will be reparented

// and resized correctly later when it's in-place activated.

if (m_pClientSite)

    VERIFY (CreateControlWindow (::GetDesktopWindow(), CRect(0,0,0,0), CRect(0,0,0,0)));

COleControl::OnSetClientSite();

}ATL的解决办法：

// CMyControl is derived from CComControl

STDMETHOD(SetClientSite)(IOleClientSite *pClientSite)

{

if (pClientSite)

{

    RECT rc = {0,0,0,0};

    // Don't have access to the container's window so just use the

    // desktop. Window will be resized correctly during in-place

    // activation.

    HWND hWnd = CreateControlWindow(::GetDesktopWindow(), rc);

    _ASSERT (hWnd);

}

return IOleObjectImpl<CMyControl>::SetClientSite (pClientSite);

}HRESULT InPlaceActivate(LONG iVerb, const RECT* prcPosRect)

{

// Get the container's window.

_ASSERT (m_spClientSite);

LPOLEINPLACESITE pInPlaceSite = NULL;

HRESULT hr = m_spClientSite->QueryInterface(IID_IOleInPlaceSite, (void**)&pInPlaceSite);

_ASSERT (SUCCEEDED (hr) && pInPlaceSite);

HWND hParent = NULL;

hr = pInPlaceSite->GetWindow (&hParent);

_ASSERT (SUCCEEDED (hr) && hParent);

pInPlaceSite->Release ();

// Set container window as our parent window

SetParent (hParent);

return CComControlBase::InPlaceActivate(iVerb, prcPosRect);

}

参看：