| 发表于：2007-04-04 17:40:121楼 得分:0 |
dynamic-link library search order
starting with windows xp, the dynamic-link library （dll) search order used by the system depends on the setting of the hklm\system\currentcontrolset\control\session manager\safedllsearchmode value.
windows server 2003: the default value is 1.
windows xp: the default value is 0.
if safedllsearchmode is 1, the search order is as follows:
the directory from which the application loaded.
the system directory. use the getsystemdirectory function to get the path of this directory.
the 16-bit system directory. there is no function that obtains the path of this directory, but it is searched.
the windows directory. use the getwindowsdirectory function to get the path of this directory.
the current directory.
the directories that are listed in the path environment variable.
if safedllsearchmode is 0, the search order is as follows:
the directory from which the application loaded.
the current directory.
the system directory. use the getsystemdirectory function to get the path of this directory.
the 16-bit system directory. there is no function that obtains the path of this directory, but it is searched.
the windows directory. use the getwindowsdirectory function to get the path of this directory.
the directories that are listed in the path environment variable.
alternate search order
the loadlibraryex function supports an alternate search order if the call specifies load_with_altered_search_path and the lpfilename parameter specifies a path. if safedllsearchmode is 1, the alternate search order is as follows:
the directory specified by lpfilename.
the system directory. use the getsystemdirectory function to get the path of this directory.
the 16-bit system directory. there is no function that obtains the path of this directory, but it is searched.
the windows directory. use the getwindowsdirectory function to get the path of this directory.
the current directory.
the directories that are listed in the path environment variable.
if safedllsearchmode is 0, the alternate search order is as follows:
the directory specified by lpfilename.
the current directory.
the system directory. use the getsystemdirectory function to get the path of this directory.
the 16-bit system directory. there is no function that obtains the path of this directory, but it is searched.
the windows directory. use the getwindowsdirectory function to get the path of this directory.
the directories that are listed in the path environment variable.
note that the standard search strategy and the alternate search strategy differ in just one way: the standard search begins in the calling application 's directory, and the alternate search begins in the directory of the ＥＸＥＣutable module that loadlibraryex is loading.
if you specify the alternate search strategy, its behavior continues until all associated ＥＸＥＣutable modules have been located. after the system starts processing dll initialization routines, the system reverts to the standard search strategy.
legacy search order
earlier versions of windows do not support the safedllsearchmode value. the dll search order is as follows.
windows 2000/nt: the system searches for dlls in the following order:
the directory from which the application loaded.
the current directory.
the system directory. use the getsystemdirectory function to get the path of this directory.
the 16-bit system directory. there is no function that obtains the path of this directory, but it is searched.
the windows directory. use the getwindowsdirectory function to get the path of this directory.
the directories that are listed in the path environment variable.
windows me/98/95: the system searches for dlls in the following order:
the directory from which the application loaded.
the current directory.
the system directory. use the getsystemdirectory function to get the path of this directory.
the windows directory. use the getwindowsdirectory function to get the path of this directory.
the directories that are listed in the path environment variable. | | |
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