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I’m reading in my program some files from system32 folder; and one of these files (C:\Windows\System32\gdi32.dll) demonstrates a very strange behavior. When I’m reading it from my program, it shows size of 310’784 bytes; and when I view it’s size from Explorer, it shows size of 404’480 bytes.
How could that be?
The most likely explanation is that your program is 32-bit and Explorer is 64-bit. When a 32-bit program opens files in
C:\Windows\System32(which contains 64-bit DLLs), it’s actually redirected toC:\Windows\SysWOW64(which contains 32-bit DLLs). The size difference you’re seeing is the difference between theC:\Windows\SysWOW64\gdi32.dllandC:\Windows\System32\gdi32.dllfiles.For more information, see KB article 896456.