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I'm using FreePascal, it's compiler is not so smart as C++ compiler, so, FPC passed 5th parameters as dword and generated below asm:
mov rcx, qword prt [rsp + $44]
mov edx, 4
mov r8d, 0
mov r9d, 0
mov dword prt [rsp+$20], ebx
call MapViewOfFile
Kernel does not take this parameter as dword, it takes it as qword, so the data at [rsp+$24] was not empty and kernel thought that 5th parameter is not empty and so failed...
To solve - just change function declaration. Sorry, this is only FPC bug...
But VirtualQuery really works not same as in x86...
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