以后可能用得着的几个 api 函数，留个记录，以免到要用时忘了名称。
IsUserAnAdmin - 判断当前用户是否是 Administrators 组的成员：
declare long IsUserAnAdmin in shell32
? iif( 1 == IsUserAnAdmin(), 'Yes', 'No')
FindExecutable - 查找打开指定文件的缺省关联程序：
? GetExecFile('rar')
function GetExecFile( tcExtName ) && tcExtName - 要检测的文件扩展名
local lcFile, lcBuff, lnResult, lcRet
declare long FindExecutable in shell32 string lpFile, string lpDirectory, string @ lpResult
m.lcFile = forceext(sys(2015), m.tcExtName)
strtofile([], m.lcFile)
m.lcBuff = replicate(chr(0), 260)
m.lnResult = FindExecutable(justfname(m.lcFile), justpath(m.lcFile), @ m.lcBuff)
erase (m.lcFile)
m.lcRet = ''
do case
case 31 == m.lnResult
messagebox('没有缺省关联程序！', 16)
case 32 <= m.lnResult
m.lcRet = rtrim(m.lcBuff, chr(0))
otherwise
messagebox('其他错误，错误码：' + transform(m.lnResult), 16)
endcase
return m.lcRet
endfunc
DoFileDownload - 调用 IE 自带的下载工具
declare long DoFileDownload in shdocvw.dll string lpszFile
DoFileDownload(strconv('http://www.abc.com/files/file01.rar', 5))
shell32 中未公开的函数(参见 http://vbnet.mvps.org/index.html?code/internet/dofiledownloadcustom.htm)：
| Ord | Hidden name | pb | Renamed to | Operation Performed | ||||
| 59 | _RestartDialog | 12 | SHRestartSystemMB | Displays the "System Settings Change" reboot message box | ||||
| 60 | ? | 4 | SHShutDownDialog | Displays the Shut Down dialog (Start/Shut Down) | ||||
| 61 | ? | 24 | SHRunDialog | Displays the Run dialog (Start/Run) | ||||
| 62 | _PickIconDlg | 16 | SHChangeIconDialog | Allows choosing form amongst a files icons. | ||||
| 31 | _PathFindExtension | 4 | SHGetExtension | Returns pointer to the last dot in szPath and the string following it. | ||||
| 32 | _PathAddBackslash | 4 | SHAddBackslash | Inserts a backslash before the first null char in szPath. | ||||
| 34 | _PathFindFileName | 4 | SHGetFileName | Returns a pointer to the string in szPath after the last backslash. | ||||
| 35 | _PathRemoveFileSpec | 4 | SHGetPath | Returns a pointer to the string in szPath before the last backslash. | ||||
| 40 | _PathIsRelative | 4 | SHPathIsRelative | Returns non-zero if szPath does not evaluate to a UNC path. | ||||
| 43 | _PathIsExe | 4 | SHPathIsExe | Returns non-zero if szPath has an executable extension. | ||||
| 45 | _PathFileExists | 4 | SHFileExists | Returns non-zero if szPath is valid absolute UNC path. | ||||
| 52 | _PathGetArgs | 4 | SHGetPathArgs | Returns a pointer to the string after first space in szPath. | ||||
| 55 | _PathQuoteSpaces | 4 | SHAddPathQuotes | Adds quotes if the path or file contains a space | ||||
| 56 | _PathUnquoteSpaces | 4 | SHRemovePathQuotes | Removes quotes from quoted paths/filename | ||||
| 92 | _PathGetintPath | 4 | SHGetShortPathName | Fills szPath w/ its DOS (8.3) file system string. |
下面这些也是比较有用的：
PathBuildRoot - Creates a root path from a given drive number.
PathCompactPathEx - Truncates a path to fit within a certain number of characters by replacing path components with ellipses.
PathFileExists - Determines whether a path to a file system object such as a file or directory is valid.
PathFindExtension - Searches a path for an extension.
PathFindFileName - Searches a path for a file name.
PathFindOnPath - Searches for a file.
PathGetDriveNumber - Searches a path for a drive letter within the range of "A" to "Z" and returns the corresponding drive number.
PathGetShortPath - Retrieves the short path form of a specified input path.
PathIsDirectory - Verifies that a path is a valid directory.
PathIsNetworkPath - Determines whether a path string represents a network resource.
PathIsRelative - Searches a path and determines if it is relative.
PathIsRoot - Parses a path to determine if it is a directory root.
PathIsURL - Tests a given string to determine if it conforms to a valid URL format.
PathMakeUniqueName - Creates a unique path name from a template.
PathRenameExtension - Replaces the extension of a file name with a new extension.
PathYetAnotherMakeUniqueName - Creates a unique filename based on an existing filename.
UrlEscape - Converts characters in a URL that might be altered during transport across the Internet ("unsafe" characters) into their corresponding escape sequences.
UrlGetPart - Accepts a URL string and returns a specified part of that URL.
UrlHash - Hashes a URL string.
UrlUnescape - Converts escape sequences back into ordinary characters.
参考网站：http://vbnet.mvps.org/index.html
GB2312：CHR(160-254) + CHR(160-254)
GBK：CHR(129-254) + CHR(64-126,128-254)