C++ Byte, sprintf, hex. Convert byte to binary - c++

Question

I am working on this project which has this format/command. My problem is with b0,b1..b5. I am not very good at c++. I can do this in c#.
Configure Image Data (CID) Command
Esc*v6W b0 b1 b2 b3 b4 b5
Where:
• 6 = the number of bytes following the command
• b0 = byte 0 = the color space
• b1 = byte 1 = the Pixel Encoding mode
• b2 = byte 2 = the number of bits per index or palette size
• b3 = byte 3 = the number of bits in the color component
• b4 = byte 4 = the number of bits in the color component
• b5 = byte 5 = the number of bits in the color component
Bytes 0 through 5 must contain binary data, not ASCII.
How should I do this in c++. This is what I have so far.
int srcBitsPerPixel = 24;
BYTE bitsPerIndex = 0x00;
std::string str;
std::vector<unsigned char> seq(6);
char bufv6[6];
StringCchPrintfA(bufv6, 6, "%c%s", 27, "*v6W"); // 5 chars
MoveMemory(pOemPDEV->pBufStart + dwOffset, bufv6, 6);
dwOffset += 5;
seq[0] = (BYTE)0x02; // 0: ColourSpace
seq[1] = (BYTE)0x03; // 1: Pixel Encoding Mode
seq[2] = (BYTE)0x00; // 2: Bits Per Index
seq[3] = (BYTE)0x08; // 3: Bits Per Component
seq[4] = (BYTE)0x08; // 4: Bits Per Component
seq[5] = (BYTE)0x08; // 5: Bits Per Component
for (int i = 0; i < 6; i++)
{
char bufV6W[4];
StringCchPrintfA(bufV6W, 4, "%02X", seq[i]);
str.append(bufV6W);
}
char v6[50];
StringCchPrintfA(v6,50, "%c%s",27, str);
MoveMemory(pOemPDEV->pBufStart + dwOffset, v6, 50);
dwOffset += 1;
But I am not getting the correct results. Can anyone provide some suggestions. This is HP PCL in c++. This way of doing may be very old, not C++ standards, I agree.
Here is how it looks in a HxD editor

Answer 1

Judging by the functions used there, you probably need to build and output that sequence to a stream (but you should really try to explain better next time), so try this:
std::vector<unsigned char> v = { '*', 'v', '6', 'W',
0x02, // b0: ColourSpace
0x00, // b1
0x08, // b2
0x08, // b3
0x08, // b4
0x08 }; // b5
std::copy(v.begin(), v.end(), pOemPDEV->pBufStart + dwOffset);