int len=str.GetLength();

memset(buffer,0,len+1);

WideCharToMultiByte(CP_OEMCP, NULL, (LPCWSTR)str, -1,NULL, 0, NULL, FALSE);

WideCharToMultiByte(CP_OEMCP, NULL, (LPCWSTR)str, -1,(LPSTR)buffer, len, NULL, FALSE);

buffer[len]='\0';

//预转换，得到所需空间的大小

int wcsLen = ::MultiByteToWideChar(CP_ACP, NULL, inputbuffer, strlen(inputbuffer), NULL, 0);

//分配空间要给'\0'留个空间，MultiByteToWideChar不会给'\0'空间

wchar_t* wszString = new wchar_t[wcsLen + 1];

//转换

::MultiByteToWideChar(CP_ACP, NULL, inputbuffer, strlen(inputbuffer), wszString, wcsLen);

//最后加上'\0'

wszString[wcsLen] = '\0';

//附加到CString对象上

content.Append(wszString);

short digit = n & 0xf; //n%16

short decimal = (n-digit) >> 4; //n/16

res[0] = digit>9?('A'-10)+digit : '0'+digit;

res[1] = decimal>9?('A'-10)+decimal : '0'+decimal;

int i=0;

for(;i<length;i++){

char res[2]={0};

Char2Hex(data[i],res);

str[i*2]=res[1];

str[i*2+1]=res[0];

}

str[i*2]='\0';