DumpBin is used to find out whether a binary is 32 bit or 64
bit.
DumpBin is to display binary file information, this tool is
part of visual studio
dumpbin /headers secur32.dll
Output would contain
=======================
Microsoft (R) COFF/PE Dumper Version 12.00.30723.0
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file secur32.dll
PE signature found
File Type: DLL
FILE HEADER VALUES
14C
machine (x86) ( this is 32 binary)
6
number of sections
54503D8B time
date stamp Tue Oct 28 21:06:19 2014
0 file
pointer to symbol table
0
number of symbols
E0 size
of optional header
2102 characteristics
Executable
32
bit word machine DLL
=========================================
For 64 bit output would be
========================================
Microsoft (R) COFF/PE Dumper Version 12.00.30723.0
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file secur32.dll
PE signature found
File Type: DLL
FILE HEADER VALUES
8664
machine (x64) ( this is 64 bit binary)
7
number of sections
54504306 time
date stamp Tue Oct 28 21:29:42 2014
0 file
pointer to symbol table
0
number of symbols
F0 size
of optional header
2022
characteristics
Executable
Application can handle large (>2GB) addresses DLL