Function strUnicodeLen(asContents) '計算unicode字符串的Ansi編碼的長度 asContents1="a"&asContents len1=len(asContents1) k=0 for i=1 to len1 asc1=asc(mid(asContents1,i,1)) if asc1<0 then asc1=65536+asc1 if asc1>255 then k=k+2 else k=k+1 end if next strUnicodeLen=k-1 End Function
Function strUnicode2Ansi(asContents) '將Unicode編碼的字符串，轉換成Ansi編碼的字符串 strUnicode2Ansi="" len1=len(asContents) for i=1 to len1 varchar=mid(asContents,i,1) varasc=asc(varchar) if varasc<0 then varasc=varasc+65536 if varasc>255 then varHex=Hex(varasc) varlow=left(varHex,2) varhigh=right(varHex,2) strUnicode2Ansi=strUnicode2Ansi & chrb("&H" & varlow ) & chrb("&H" & varhigh ) else strUnicode2Ansi=strUnicode2Ansi & chrb(varasc) end if next End function
Function strAnsi2Unicode(asContents) '將Ansi編碼的字符串，轉換成Unicode編碼的字符串 strAnsi2Unicode = "" len1=lenb(asContents) if len1=0 then exit function for i=1 to len1 varchar=midb(asContents,i,1) varasc=ascb(varchar) if varasc > 127 then strAnsi2Unicode = strAnsi2Unicode & chr(ascw(midb(asContents,i+1,1) & varchar)) i=i+1 else strAnsi2Unicode = strAnsi2Unicode & chr(varasc) end if next End function
Function Base64encode(asContents) '將Ansi編碼的字符串進行Base64編碼 'asContents應當是ANSI編碼的字符串（二進制的字符串也可以） Dim lnPosition Dim lsResult Dim Char1 Dim Char2 Dim Char3 Dim Char4 Dim Byte1 Dim Byte2 Dim Byte3 Dim SaveBits1 Dim SaveBits2 Dim lsGroupBinary Dim lsGroup64 Dim m4,len1,len2
len1=Lenb(asContents) if len1<1 then Base64encode="" exit Function end if
m3=Len1 Mod 3 If M3 > 0 Then asContents = asContents & String(3-M3, chrb(0)) '補足位數是為了便于計算
IF m3 > 0 THEN len1=len1+(3-m3) len2=len1-3 else len2=len1 end if
lsResult = ""
For lnPosition = 1 To len2 Step 3 lsGroup64 = "" lsGroupBinary = Midb(asContents, lnPosition, 3)
