nt = 1
         .bColorCount = nColourCount
      ElseIf (nColourCount = 16) Then
         .wBitCount = 4
         .bColorCount = nColourCount
      ElseIf (nColourCount = 256) Then
         .wBitCount = 8
         .bColorCount = 0
      Else
         .wBitCount = 24
         .bColorCount = 0
      End If
      .wPlanes = 1
      .bWidth = nWidth
      .bHeight = nHeight
      If (iItem = 0) Then
         .dwImageOffset = Len(m_tID) + Len(m_tIDE(iItem))
      Else
         .dwImageOffset = lNewImageOffset
 