域作用符::前面没有任何东西,这样代表什么?
如下代码:
// Create windowm_hInstance = hInstance;RECT rcWindow = {0,0,m_nWidth,m_nHeight};::AdjustWindowRect( &rcWindow, WS_OVERLAPPEDWINDOW, FALSE );m_hWnd = CreateWindow( "D3D11Window", szTitle, uStyle, m_ptPosition.x, m_ptPosition.y, m_nWidth, m_nHeight, NULL, NULL, hInstance, (void*)this );
::AdjustWindowRect( &rcWindow, WS_OVERLAPPEDWINDOW, FALSE );