## Virtual Device Driver Reference for OS/2

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### VDHGetDirtyPageInfo - Parameters

VDMHandle (HVDM) Handle to the DOS session that owns the object. A 0 (zero) value indicates the current DOS session.

StartingAddress (PVOID) Starting address of the range of pages to scan.

PageRange (ULONG) Range (number of pages) to scan. Maximum allowed is 32.

rc (ULONG) - returns

Success If the function is successful, it returns the bit vector. The low- order bit (that is, bit 0, the rightmost bit) is the dirty bit for the first page scanned. Bit 1 (from the right) is the dirty bit for the next page, and so forth for all the pages scanned.

Failure If any of the input parameters are invalid, a system halt occurs.