## Virtual Device Driver Reference for OS/2

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### Page-Granular Memory Management Services

VDHAllocPages Allocate page-aligned memory object
VDHFindFreePages Find largest available linear memory
VDHFreePages Free memory object
VDHGetDirtyPageInfo Return status of dirty bits
VDHInstallFaultHook Install page fault handler
VDHMapPages Map specified linear address
VDHQueryFreePages Return amount of free virtual memory
VDHReallocPages Reallocate memory object
VDHRemoveFaultHook Remove page fault handler
VDHReservePages Reserve range of linear addresses
VDHUnreservePages Unreserve range of linear addresses