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VirtualUnlock info  Overview  Group

The VirtualUnlock function unlocks a specified range of pages in the virtual address space of a process, enabling the system to swap the pages out to the paging file if necessary.

BOOL VirtualUnlock(

    LPVOID lpAddress,

// address of first byte of range

    DWORD dwSize 

// number of bytes in range

   );

Parameters

lpAddress
Points to the base address of the region of pages to be unlocked.
dwSize
Specifies the size, in bytes, of the region being unlocked. The region of affected pages includes all pages containing one or more bytes in the range from the lpAddress parameter to (lpAddress+dwSize). This means that a 2-byte range straddling a page boundary causes both pages to be unlocked.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

For the function to succeed, the range specified need not match a range passed to a previous call to the VirtualLock function, but all pages in the range must be locked.

See Also

VirtualLock 


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