:: Operator Without Preceding Class or Namespace

Asked Feb 28 '14 at 03:27

Active Feb 28 '14 at 03:27

Viewed 42 times

I am getting started coding a win32 windows application and ran across a c++ syntax that I haven't seen before in some example code on the MSDN.

LRESULT CALLBACK DemoApp::WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{

    /* Code omitted for clarity */

    ::SetWindowLongPtrW(
    hwnd,
    GWLP_USERDATA,
    PtrToUlong(pDemoApp)
    );

    /* Code omitted for clarity */

}

I am used to seeing a class / namespace preceding the :: operator. What does this mean when there is no preceding identifier. Also, is there a name for this construct so I can efficiently Google more information?

Thanks!

asked Feb 28 '14 at 03:27

PeterM

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check this one ... http://msdn.microsoft.com/en-us/library/b451xz31.aspx – Tun Zarni Kyaw Feb 28 '14 at 03:30
The global namespace has no name. – Mike Seymour Feb 28 '14 at 03:31
@JesseGood Thanks for the link, answers my question perfectly. – PeterM Feb 28 '14 at 03:33

:: Operator Without Preceding Class or Namespace

0 Answers0