MmQuerySystemSize function (wdm.h)
The MmQuerySystemSize routine returns an estimate of the amount of memory in the system.
C++
MM_SYSTEMSIZE MmQuerySystemSize();
MmQuerySystemSize returns one of MmSmallSystem, MmMediumSystem, or MmLargeSystem.
This routine can be called during driver initialization to determine how much memory it is practical to allocate for an internal buffer.
| Requirement | Value |
|---|---|
| Minimum supported client | Available starting with Windows 2000. |
| Target Platform | Universal |
| Header | wdm.h (include Wdm.h, Ntddk.h, Ntifs.h) |
| Library | NtosKrnl.lib |
| DLL | NtosKrnl.exe |
| IRQL | Any level |