Reserve virtual memory C++, Windows?

The solution is very simple if you want to reserve virtual memory with C++ under Windows!

1.) The program command to reserve virtual memory!

VirtualAlloc (
__in_opt LPVOID lpAddress,
__in SIZE_T dwSize,
__in DWORD flAllocationType,
__in DWORD flProtect
);

VirtualAllocEx (
__in HANDLE hProcess,
__in_opt LPVOID lpAddress,
__in SIZE_T dwSize,
__in DWORD flAllocationType,
__in DWORD flProtect
);

2.) The difference between VirtualAlloc and VirtualAllocEX?