verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hMaskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
(char*) data , m_maskBytesPerRow ) ) ;
wxASSERT_MSG( m_hMaskBitmap , wxT("Unable to create GWorld context for alpha mask") ) ;
verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hMaskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
(char*) data , m_maskBytesPerRow ) ) ;
wxASSERT_MSG( m_hMaskBitmap , wxT("Unable to create GWorld context for alpha mask") ) ;