BOOL XMemVirtualQuery(  
         HANDLE Process,  
         PVOID Address,  
         PXMEM_BASIC_INFORMATION Buffer  
)  

// To enable commit tracking
XMEM_OPTION option;
option.Option = eXMEMOPT_XMEMALLOCDEFAULT_TAG_VIRTUALALLOC;
option.u.Bool = TRUE;
XMemSetOption(option);

// To query the total commit
SIZE_T address = 0;
SIZE_T commitSize = 0;
XMEM_BASIC_INFORMATION info; = {};
while (XMemVirtualQuery(GetCurrentProcess(), (PVOID)address, &info))
{
        if ((info.State & MEM_COMMIT) &&
                (*(PDWORD)(info.TagFourCC) == *(PDWORD)("XmVA"))) {

                commitSize += info.RegionSize;
        }

        address += info.RegionSize;
}