请帮忙解释一下
Function int b64_size(ulong size,ulong flag) Library "des64.dll"
local External Functions:
Function int b64_des(ref String in,ref string out,string key,ulong size,ulong flag)Library "des64.dll"
Scrip:
//as_instr是外部输入值
long ll_size
constant string ls_key = 'SZBTZWF'
ll_Size = b64_size(len(as_instr),1)
ls_ret = Space(ll_Size )
b64_des(as_instr,ls_ret,ls_key,len(as_instr),1)
return ls_ret