Malware Analysis : VirtualAlloc Function, Usage.

While creating a malware, in-order to run they payload in the memory of the process, we need to create a memory buffer for the payload. For this purpose, we need to make use of the VirtualAlloc function.
As per the windows documentation, a VirtualAlloc function reserves, commits or changes the state of a region of pages in the virtual address space of the calling process.
Lets dig deep on this function and its parameters,

The syntax for the function usage is,
LPVOID VirtualAlloc(
  [in, optional] L...