BOOLEAN GetRtPhysicalMemoryInfo(
    RTHANDLE hProcess, 
    LPPHYSICAL_MEMORY_INFO pMemoryInfo
);

typedef struct {
    RTHANDLE  hTargetProcess;     // process for which the information is returned
    RTHANDLE  hParentProcess;     // process’ parent process handle
    QWORD     cbPoolMax;          // pool max value, in bytes
    QWORD     cbPoolMin;          // pool min value, in bytes
    QWORD     cbAllocated;        // memory currently allocated from pool min, in bytes
    QWORD     cbBorrowed;         // memory borrowed from parent process, in bytes
    QWORD     cbAvailable;        // memory available, in bytes
    QWORD     cbLargestAvailable; // largest memory area available, in bytes
} PHYSICAL_MEMORY_INFO, *LPPHYSICAL_MEMORY_INFO;

hProcess

A handle for a process for which the information is to be returned.

pMemoryInfo

A pointer to a PHYSICAL_MEMORY_INFO structure where the information is to be returned.