covOptional,
                      covOptional,  
                       
                      covOptional,
                      covTrue,      
                      covOptional  
                      covOptional
                      covOptional   
                      )   
                      );
 

图3.2 打开word文档

(5)获得UNICODE编码并进行md5加密。

 MultiByteToWideChar(CP_ACP,0,wordtem,-1,wordstr,255); sel.MoveRight(COleVariant((short)1),COleVariant((short)1),COleVariant((short)0));
 j=wordstr[0];
wordmd5=_ecvt(j,5,&decimal,&sign);
md5T.MD5Update ((unsigned char*)_ecvt(j,5,&decimal,&sign), wordmd5.GetLength());
md5T.MD5Final (digest);
high = digest[1] /16;
low = digest[1] %16;
for (k=0;k<16; k++)
{
j=k*2;
high = digest[k] /16;
low = digest[k] %16;
if (high >=10)
{
num[j]= (unsigned char)(high-10+'A');
}
else
{
num[j]= (unsigned char)(high+'0');
}
if (low >=10)
{
num[j+1]= (unsigned char)(low-10+'A');
}
else
{
num[j+1]= (unsigned char)(low+'0');
}
}


(6) 生成水印并嵌入文档。

   switch (num[tempm])
  { case '0': wf[i].line=55;break;
    case '1': wf[i].line=1;break;
    case '2': wf[i].line=3;break;
    case '3': wf[i].line=4;break;
    case '4': wf[i].line=6;break;
    case '5': wf[i].line=7;break;
    case '6': wf[i].line=9;break;
    case '7': wf[i].line=10;break;
    case '8': wf[i].line=11;break;
    case '9': wf[i].line=20;break;
    case 'A': wf[i].line=23;break;
        case 'B': wf[i].line=25;break;
    case 'C': wf[i].line=26;break;
    case 'D': wf[i].line=27;break;
    case 'E': wf[i].line=39;break;
    case 'F': wf[i].line=43;break;
  }
  if ((num[tempm+1]>'8') && (num[tempm+2]>'8') && (num[tempm+3]>'8'))
  {wf[i].color=RGB(255,255,255);}
  if ((num[tempm+1]>'8') && (num[tempm+2]>'8') && (num[tempm+3]<='8'))
  {wf[i].color=RGB(255,255,254);}
  if ((num[tempm+1]>'8') && (num[tempm+2]<='8') && (num[tempm+3]>'8')) 基于WORD文档的防篡改水印系统设计与实现(9):http://www.751com.cn/jisuanji/lunwen_1627.html