如何判断windows动态链接库是32还是64位

如果安装过Visual Studio的话，直接打开一个VS提供的控制台窗口，比如VS2012 x64 Native Tools Command Prompt.

用下面的命令查看程序的头部信息：“dumpbin /HEADERS dll路径”

gdal_1.8_rtc>dumpbin /HEADERS gdal18.dll
Microsoft (R) COFF/PE Dumper Version 11.00.60610.1
Copyright (C) Microsoft Corporation.  All rights reserved. 

Dump of file gdal18.dll 

PE signature found 

File Type: DLL 

FILE HEADER VALUES
            8664 machine (x64)
               6 number of sections
        52130233 time date stamp Tue Aug 20 13:44:19 2013
               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 

gdal_1.8_rtc>dumpbin /HEADERS gdal18.dll
Microsoft (R) COFF/PE Dumper Version 11.00.60610.1
Copyright (C) Microsoft Corporation.  All rights reserved.

Dump of file gdal18.dll

PE signature found

File Type: DLL

FILE HEADER VALUES
            8664 machine (x64)
               6 number of sections
        52130233 time date stamp Tue Aug 20 13:44:19 2013
               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