Allocate memory in the debuggee (using VirtualAllocEx). The memory is allocated with PAGE_EXECUTE_READWRITE protection.
[arg1] Size of the memory to allocate. When not specified, a default size of 0x1000 is used.
[arg2] Address to allocate the memory at. Unspecified or zero means a random address.
This command sets $result to the allocated memory address. It also sets the $lastalloc variable to the allocated memory address when VirtualAllocEx succeeded.