IWebBrowser2 Controlling visibility

Question

I create hidden IWebBrowser2 object and it work's fine but after few seconds I want to change visibility to true and my application crashes.

pBrowser2->put_Visible(VARIANT_TRUE);

What I'm doing wrong ?

"Crashes" always needs to come with details such as call stack at crash position. — Roman R., Jun 04 '14 at 16:52
All backtrace from Dev C++ http://pastebin.com/E10bftuT And Code http://pastebin.com/zC3zvCmy — DarkGL, Jun 04 '14 at 17:57
-1 Please don't ask questions about code that is not in the question. We need information in questions and not in off site links given in comments. — David Heffernan, Jun 05 '14 at 08:09

score 3 · Accepted Answer · answered Jun 04 '14 at 21:00

You're using pBrowser2 after releasing it.

You have:

pBrowser2->Release();  // pBrowser NOW INVALID!!!
srand( time( NULL ) );
//Sleep( ( std::rand() % 5000 ) + 5000 );
if(std::rand() % 100 <= chance ){
    pBrowser2->put_Visible(VARIANT_TRUE);  // instant crash here!
}

Move the call to Release() after you're done using it, or use a COM smart pointer so you don't have to manage it yourself. Simplest fix:

srand( time( NULL ) );
//Sleep( ( std::rand() % 5000 ) + 5000 );
if(std::rand() % 100 <= chance ){
    pBrowser2->put_Visible(VARIANT_TRUE);  // works
}
pBrowser2->Release();  // pBrowser NOW INVALID!!!

IWebBrowser2 Controlling visibility

1 Answers1