How can I convert DWORD or string to BYTE* - c++

Question

Hello I am creating a file encryption code I read a file and I need to turn the file that I am reading to BYTE* I tried searching but every single time I got "CL.exit". This is how I read the file.
HANDLE getFile = createFile();
DWORD reciveBytes = 0;
//If it's byte or kilobyte the size of the buffer will be 1024.
//If it's megabytes or gigabyte the size of the buffer will be 4096.
const DWORD Buffersize = 66232; // gave me warning for 1024
DWORD buffer[Buffersize];
string fileInput;
if (ReadFile(
getFile,
buffer,
Buffersize,
&reciveBytes,
NULL
)) {
}
else {
cout << "Faild!" << endl;
cout << GetLastError() << endl;
}
/*
for (unsigned int i = 0; i < reciveBytes; i++) {
if (buffer[i] != '\0') {
fileInput = fileInput + buffer[i];
}
}
*/
return buffer[reciveBytes];
now, what I need to do is to turn the return type to BYTE* so I could do something like this: BYTE* protect = (BYTE*)"Hello world!";
This is createFile():
HANDLE getFile = CreateFileA(
fileName,
GENERIC_READ,
0,
NULL,
OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL
);

Answer 1

#include <windows.h>
#include <iostream>
HANDLE createFile()
{
HANDLE getFile = CreateFileA(
"xxx.txt",
GENERIC_READ,
0,
NULL,
OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
return getFile;
}
BYTE* memoryfromfile()
{
HANDLE getFile = createFile();
DWORD reciveBytes = 0;
//If it's byte or kilobyte the size of the buffer will be 1024.
//If it's megabytes or gigabyte the size of the buffer will be 4096.
const DWORD Buffersize = 66232; // gave me warning for 1024
BYTE* memory = new BYTE[Buffersize];
memset(memory, 0, Buffersize);
std::string fileInput;
if (ReadFile(
getFile,
memory,
Buffersize,
&reciveBytes,
NULL
)) {
}
else {
std::cout << GetLastError() << std::endl;
std::cout << "Faild!" << std::endl;
}
/*
for (unsigned int i = 0; i < reciveBytes; i++) {
if (buffer[i] != '\0') {
fileInput = fileInput + buffer[i];
}
}
*/
return memory;
}
int main()
{
BYTE * temp = memoryfromfile();
std::cout << "temp = " << temp << std::endl;
delete temp;
system("pause");
return 0;
}