Getting a list of files in directory and iterate with them

hi, I found out some code or a way to accomplish my goal, I understand the code 100% but the first problem is when I run the code it throws an Error with the code (123) like:-

FindFirstFile Failed(123)

the second problem is I want to iterate for each file to call a function and within the function, there is an argument this argument is the path

here is the code::-

<pre>static void listfiles() {

	WIN32_FIND_DATA FindFileData;
	HANDLE hFind = FindFirstFile("C:\\Users\MohamedAlzurghni\source\repos\FileCrypter\Debug", &FindFileData);
	if (hFind == INVALID_HANDLE_VALUE) {
		printf("FindFirstFile failed (%d)\n", GetLastError());
		return;

	}

	do {
		if (FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
			printf(TEXT("  %s   <DIR>\n"), FindFileData.cFileName);
		else
			printf(TEXT("  %s \n"), FindFileData.cFileName);
	} while (FindNextFile(hFind, &FindFileData) != 0);

	FindClose(hFind);
}

[Update] I tried to Fix the Problem and i wrote this:-

WIN32_FIND_DATA data;
	HANDLE hFind = FindFirstFile("C:\\Users\MohamedAlzurghni\source\repos\ProjectC++\*", &data);      // DIRECTORY

	if (hFind != INVALID_HANDLE_VALUE) {
		do {
			std::cout << data.cFileName << std::endl;
		} while (FindNextFile(hFind, &data));
		FindClose(hFind);
	}

but there is no output.