## Virtual Device Driver Reference for OS/2

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### VDHCheckPagePerm - Parameters

BasePage (ULONG) Base virtual page number.

Reserved (PVOID) Reserved. Must be set to 0.

NumPages (ULONG) Number of pages to verify.

Flag (ULONG) Values are:

VPMPG_U Are the pages user-accessible?
VPMPG_W Are the pages writable?
VPMPG_R Are the pages readable (valid)?
VPMPG_X Are the pages executable?

rc (BOOL) - returns

Success If the function is successful, it returns a nonzero value.

Failure If the function fails, it returns 0.