How to use GetDHtmlDocument() in MFC programming?

Question

I am trying to use

HRESULT GetDHtmlDocument(IHTMLDocument2 **pphtmlDoc);

function in MFC programming.

Basically, I am t

Answer 1

Your calling to GetDHtmlDocument() and GetElement() will return E_NOINTERFACE.

According to my knowledge, you are not always guaranteed to have html document completely loaded when you're performing in CDHtmlDialog::OnInitDialog().

Instead, you should override CDHtmlDialog::OnDocumentComplete() in CSampleProgramDlg. It's a callback function that'll be called when document is loaded. You can assess the document then.

void CSampleProgramDlg::OnDocumentComplete(
   LPDISPATCH pDisp,
   LPCTSTR szUrl 
)
{
    // You can get the document and elements here safely
}

Your calling to MessageBox() may somehow trigger the document to be loaded in advance. Though I'm not 100% sure for it.

Hope that helps.