FIX: Navigate(2) Causes Access Violation in Shdocvw.dll

m_WebBrowser.Navigate2(pUrl, NULL, NULL, NULL, NULL);
				

RESOLUTION

You must pass the address of empty VARIANTs to the Navigate or Navigate2 methods.

Typically, this can be accomplished with the following C++ code:

VARIANT vtEmpty;
vtEmpty.vt = VT_EMPTY;
				

However, using the compiler's native support for OLE is usually much easier. Use the following code to take advantage of the compiler's native support.

_variant_t vtEmpty;
// nothing further needed
				

If you are using MFC, the COleVariant class can be used to created an empty VARIANT. The default constructor for COleVariant sets the type of the VARIANT to VT_EMPTY. Here is the MFC code:

COleVariant vtEmpty;
				

Then, you pass the vtEmpty variable to the Navigate or Navigate2 method like so:

m_WebBrowser.Navigate2(pUrl, &vtEmpty, &vtEmpty, &vtEmpty, &vtEmpty);