virtual PRUint8*    GetBits()           { return mImageBits; }
nsImageWin::GetBits() {  if ( !mImageBits ) { ConvertDDBtoDIB(GetWidth(), GetHeight()); mDIBTemp = PR_TRUE; }  return mImageBits;  }
  virtual PRUint8*    GetBits()           { return mImageBits; }