0-Day DirectX Vulnerability does not affect Windows 7

Hackers have exploited 0-Day DirectX Vulnerability to execute malicious code.
The 0-Day Vulnerability is the Windows component of DirectX.When playing QuickTime
in the browser,files will be activated automatically.
People using windosw XP visit a malicious Web site, the malicious file could be activated.And the computer will be infected.
But Windows 7 and Windows Server 2008 immune to 0-Day DirectX Vulnerability.