CPP: Windows: GetDiskFreeSpaceExW

Retrieves information about the amount of space that is available on a disk volume, which is the total amount of space, the total amount of free space, and the total amount of free space available to the user that is associated with the calling thread.

	#include <iostream>
	#include <iomanip>
	#include <Windows.h>
	int main()
	{
	ULARGE_INTEGER FreeBytesAvailableToCaller, TotalNumberOfBytes, TotalNumberOfFreeBytes;
	auto ret = GetDiskFreeSpaceExW(L"C:\\", &FreeBytesAvailableToCaller, &TotalNumberOfBytes, &TotalNumberOfFreeBytes);
	if (ret) {
	auto MB = 1.0 / (1024 * 1024 * 1024);
	std::wcout << std::setprecision(4);
	std::wcout << "FreeBytesAvailableToCaller: " << FreeBytesAvailableToCaller.QuadPart*MB << std::endl;
	std::wcout << "TotalNumberOfBytes(MB): " << TotalNumberOfBytes.QuadPart * MB << std::endl;
	std::wcout << "TotalNumberOfFreeBytes: " << TotalNumberOfFreeBytes.QuadPart*MB << std::endl;
	return 0;
	}
	else {
	return -1;
	}
	}

view raw GetDiskFreeSpaceExW.cpp hosted with ❤ by GitHub

Notes:
- Tested using Visual Studio 2022 (17.2.6) C++ Windows Console template
Reference(s):
https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getdiskfreespaceexw