문자열 함수에서 메모리 관리를 어떻게 해야할까요?

#pragma once
 
static char* ConvertToChar( __in const wchar_t *src)
{
	char* dest = NULL;
	int charLength = WideCharToMultiByte(CP_ACP, 0, src, -1, NULL, 0, NULL, NULL);
 
	dest = new char[charLength];
 
	WideCharToMultiByte(CP_ACP, 0, src, -1, dest, charLength, 0, 0);
 
	return dest;
}
 
static wchar_t* ConvertToWideChar( __in const char* src)
{
	wchar_t *dest = NULL;
	int wideCharLength = MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, NULL);
	dest = new WCHAR[wideCharLength];
 
	MultiByteToWideChar(CP_ACP, 0, src, strlen(src)+1, dest, wideCharLength)
;
	return dest;
}

char * multi_byte = ::ConvertToChar(wide_char);
...
/* 여기서 리턴된 mutli_byte로 작업을 다 하고 */
...
delete multi_byte;