Transferring data using visual C++ 6.0

**Olivia** · 01-07-2011

Can anyone help me to solve this problem? I am making a program from which I can transfer and receive data from server computer. My problem arises when I receive data from server it showed on editbox like this: "|?|". Data from server such as the below hexa code:

Code:

I am using visual C++ 6.0 and I am new to it.

**Vandam** · 01-07-2011

I think you have to make some changes in your coding part. Copy paste the below mentioned code. After copy pasting check it by sending and receiving data from server.

Code:

int sprintf(
   char *buffer,
   const char *format [,
   argument] ... 
);
int _sprintf_l(
   char *buffer,
   const char *format,
   locale_t locale [,
   argument] ... 
);
int swprintf(
   wchar_t *buffer,
   size_t count,
   const wchar_t *format [,
   argument]...
);
int _swprintf_l(
   wchar_t *buffer,
   size_t count,
   const wchar_t *format,
   locale_t locale [,
   argument] ... );

**Jacques25** · 01-07-2011

If you still did not found any help then you can take reference from the below code. Just go through the code and make some changes as per your requirement and paste it in your actual source.

Code:

int __swprintf_l(
   wchar_t *buffer,
   const wchar_t *format,
   locale_t locale [,
   argument] ... 
);
template <size_t size>
int sprintf(
   char (&buffer)[size],
   const char *format [,
   argument] ... 
); 
template <size_t size>
int _sprintf_l(
   char (&buffer)[size],
   const char *format,
   locale_t locale [,
   argument] ... 
); 
template <size_t size>
int swprintf(
   wchar_t (&buffer)[size],
   size_t count,
   const wchar_t *format [,
   argument]...
);

**Author** · 01-07-2011

If you had mentioned your code that you are using in the question then it would have been easier for me to rectify the error. So by the time let’s assume. See the below code, I hope it’s enough for you to take necessary reference from it.

Code:

// crt_sprintf.c
// compile with: /W3
// This program uses sprintf to format various
// data and place them in the string named buffer.
#include <stdio.h>
int main( void )
{
   char  buffer[200], s[] = "computer", c = 'l';
   int   i = 35, j;
   float fp = 1.7320534f;

   // Format and print various data: 
   j  = sprintf( buffer,     "   String:    %s\n", s ); // C4996
   j += sprintf( buffer + j, "   Character: %c\n", c ); // C4996
   j += sprintf( buffer + j, "   Integer:   %d\n", i ); // C4996
   j += sprintf( buffer + j, "   Real:      %f\n", fp );// C4996
   // Note: sprintf is deprecated; consider using sprintf_s instead
   printf( "Output:\n%s\ncharacter count = %d\n", buffer, j );

**Ronchi** · 01-07-2011

The below code is for transferring data. After writing this code you can transfer data from server computer easily.

Code:

CString dulieu = data.bstrVal;
for(int i = 0; i < dulieu.GetLength(); ++i)
{
   s.Format(_T("%02X"), dulieu[i]);
   m_strReceive += s;
}

**Villiers** · 02-07-2011

See the code below. With the help of this code you can create unreal COM port. You can create it by Configure Virtual Serial Port Driver. After creating this you can send data like 10 or 5B and it will show "42231C".

Code:

CString dulieu,s;
VARIANT data=m_mscomm1.GetInput();
dulieu+=data.bstrVal;
s.Format(_T("%02X"),dulieu);
m_strReceive+=s;
but when i create unreal COM port by Configure Virtual Serial Port Driver 
and send data like 10 or 5B it show "42231C".