VirtualQuery- get the access protection

This is a discussion on VirtualQuery- get the access protection within the C Programming forums, part of the General Programming Boards category; hello. i want to go over the addresses of a process and get the access protect of the blocks . ...

  1. #1
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    VirtualQuery- get the access protection

    hello.
    i want to go over the addresses of a process and get the access protect of the blocks .

    so there are many constants which present the protect:
    PAGE_EXECUTE - 0x10
    PAGE_EXECUTE_READ - 0x20
    PAGE_EXECUTE_READWRITE- 0x40
    PAGE_EXECUTE_WRITECOPY - 0x80
    PAGE_NOACCESS - 0x01
    PAGE_READONLY- 0x02
    PAGE_READWRITE - 0x04
    PAGE_WRITECOPY - 0x08
    PAGE_GUARD - 0x100
    PAGE_NOCACHE - 0x200
    PAGE_WRITECOMBINE - 0x400

    now i can check if MEMORY_BASIC_INFORMATION.protect (of a specific block) is equal to one of the access protects above.

    but what if the access protect is combined with some access protects? (with | ? )

    what is the best solution to solve it?
    thanks!

  2. #2
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    One way is to bitwise AND them together using the & operator.

    ANDing the field with each value will tell you which values are in there. If the value is in there it will return TRUE, if not it will return FALSE.

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