$m_lpVer
$m_nWidth
$m_nHeight
$m_bGlobalClr
$m_nColorRes
$m_bSorted
$m_nTableSize
$m_nBgColor
$m_nPixelRatio
$m_colorTable
CGIFFILEHEADER()
load( $lpData, $hdrLen)
w2i( $str)