\S1{generalpurpose} General Purpose Instructions

\S2{callinstdll} CallInstDLL

\c dllfile function_name

Calls a function named \e{function_name} inside a NSIS extension DLL, a plug-in. See the \L{../Examples/Plugin/}{example plugin} for how to make one. Extension DLLs can access the stack and variables. Note: To automatically extract and call plug-in DLLs, use a plug-in command instead of \R{callinstdll}{CallInstDLL}.

\c Push "a parameter"
\c Push "another parameter"
\c CallInstDLL $INSTDIR\somedll.dll somefunction

For easier plug-in handling, use the new \R{plugindlls}{plug-in call syntax}.

\S2{copyfiles} CopyFiles

\c [/SILENT] [/FILESONLY] filespec_on_destsys destination_path [size_of_files_in_kb]

Copies files from the source to the destination on the installing system. Useful with $EXEDIR if you want to copy from installation media, or to copy from one place to another on the system. You might see a Windows status window of the copy operation if the operation takes a lot of time (to disable this, use /SILENT). The last parameter can be used to specify the size of the files that will be copied (in kilobytes), so that the installer can approximate the disk space requirements. On error, or if the user cancels the copy (only possible when /SILENT was omitted), the error flag is set. If /FILESONLY is specified, only files are copied.

Fully-qualified path names should always be used with this instruction. Using relative paths will have unpredictable results.

\c CreateDirectory $INSTDIR\backup
\c CopyFiles $INSTDIR\*.dat $INSTDIR\backup

\S2{createdirectory} CreateDirectory

\c path_to_create

Creates (recursively if necessary) the specified directory. The error flag is set if the directory couldn't be created.

You should always specify an absolute path.

\c CreateDirectory $INSTDIR\some\directory

\S2{createshortcut} CreateShortcut

\c [/NoWorkingDir] link.lnk target.file [parameters [icon.file [icon_index_number [start_options [keyboard_shortcut [description]]]]]]

Creates a shortcut 'link.lnk' that links to 'target.file', with optional parameters 'parameters'.
You must specify an absolute path to the .lnk file.
The icon used for the shortcut is 'icon.file,icon_index_number'; for default icon settings use empty strings for both icon.file and icon_index_number.
start_options should be one of: \e{SW_SHOWNORMAL}, \e{SW_SHOWMAXIMIZED}, \e{SW_SHOWMINIMIZED}, or an empty string.
keyboard_shortcut should be in the form of 'flag|c' where flag can be a combination (using |) of: \e{ALT}, \e{CONTROL}, \e{EXT}, or \e{SHIFT}. c is the character to use (a-z, A-Z, 0-9, F1-F24, etc). Note that no spaces are allowed in this string. A good example is "ALT|CONTROL|F8". $OUTDIR is stored as the shortcut's working directory property. You can change it by using \R{setoutpath}{SetOutPath} before creating the shortcut or use /NoWorkingDir if you don't need to set the working directory property.
description should be the description of the shortcut, or comment as it is called under XP.
The error flag is set if the shortcut cannot be created (i.e. either of the paths (link or target) does not exist, or some other error).

\c CreateDirectory "$SMPROGRAMS\My Company"
\c CreateShortcut "$SMPROGRAMS\My Company\My Program.lnk" "$INSTDIR\My Program.exe" \
\c   "some command line parameters" "$INSTDIR\My Program.exe" 2 SW_SHOWNORMAL \
\c   ALT|CONTROL|SHIFT|F5 "a description"

\S2{getdllversion} GetDLLVersion

\c filename user_var(high dword output) user_var(low dword output)

Gets the version information from the DLL (or any other executable containing version information) in "filename". Sets the user output variables with the high and low dwords of version information on success; on failure the outputs are empty and the error flag is set. The following example reads the DLL version and copies a human readable version of it into $0:

\c GetDllVersion "$INSTDIR\MyDLL.dll" $R0 $R1
\c IntOp $R2 $R0 / 0x00010000
\c IntOp $R3 $R0 & 0x0000FFFF
\c IntOp $R4 $R1 / 0x00010000
\c IntOp $R5 $R1 & 0x0000FFFF
\c StrCpy $0 "$R2.$R3.$R4.$R5"

\S2{getdllversionlocal} GetDLLVersionLocal

\c localfilename user_var(high dword output) user_var(low dword output)

This is similar to \R{getdllversion}{GetDLLVersion}, only it acts on the system building the installer (it actually compiles into two \R{StrCpy}{StrCpy} commands). Sets the two output variables with the DLL version information of the DLL on the build system. Use \R{ppgetdllversion}{!getdllversion} if you need to use the values with \R{viproductversion}{VIProductVersion}.

\S2{getfiletime} GetFileTime

\c filename user_var(high dword output) user_var(low dword output)

Gets the last write time of "filename". Sets the user output variables with the high and low dwords of the FILETIME timestamp on success; on failure the outputs are empty and the error flag is set.

\S2{getfiletimelocal} GetFileTimeLocal

\c localfilename user_var(high dword output) user_var(low dword output)

This is similar to \R{getfiletime}{GetFileTime}, only it acts on the system building the installer (it actually compiles into two \R{StrCpy}{StrCpy} commands). Sets the two output variables with the file timestamp of the file on the build system.

\S2{getknownfolderpath} GetKnownFolderPath

\c user_var(output) knownfolderid

Get the path of a \W{https://docs.microsoft.com/en-us/windows/win32/shell/knownfolderid}{known folder}. The error flag is set and the output variable is empty if the call fails or the knownfolderid guid is not available. This function is only able to resolve known folders on Windows Vista or higher.

\c !include WinCore.nsh
\c !include LogicLib.nsh
\c 
\c Function .onInit
\c ${If} $InstDir == ""
\c   GetKnownFolderPath $InstDir ${FOLDERID_UserProgramFiles} ; This exists on Win7+
\c   StrCmp $InstDir "" 0 +2 
\c   StrCpy $InstDir "$LocalAppData\Programs" ; Fallback directory
\c   StrCpy $InstDir "$InstDir\$(^Name)"
\c ${EndIf}
\c FunctionEnd

\S2{getfullpathname} GetFullPathName

\c [/SHORT] user_var(output) path_or_file

Assign the full path of the file specified to user variable $x. If the path portion of the parameter is not found, the error flag will be set and $x will be empty. If /SHORT is specified, the path is converted to the short filename form. However, if /SHORT is not specified, the path isn't converted to its long filename form. To get the long filename, call GetLongPathName using the System plug-in. Note that GetLongPathName is only available on Windows 98, Windows 2000 and above.

\c StrCpy $INSTDIR $PROGRAMFILES\NSIS
\c SetOutPath $INSTDIR
\c GetFullPathName $0 ..
\c DetailPrint $0 # will print C:\Program Files
\c GetFullPathName /SHORT $0 $INSTDIR
\c DetailPrint $0 # will print C:\Progra~1\NSIS

\c StrCpy $0 C:\Progra~1\NSIS
\c System::Call 'kernel32::GetLongPathName(t r0, t .r1, i ${NSIS_MAX_STRLEN}) i .r2'
\c StrCmp $2 error +2
\c StrCpy $0 $1
\c DetailPrint $0 # will print C:\Program Files\NSIS, where supported

\S2{gettempfilename} GetTempFileName

\c user_var(output) [base_dir]

Assign to the user variable $x, the name of a temporary file. The file will be created for you and it will be empty. The name of the temporary file is guaranteed to be unique. If to want the temporary file to be created in another directory other than the Windows temp directory, specify a base_dir. You should \R{delete}{Delete} the file when you are done with it.

\c GetTempFileName $0
\c File /oname=$0 something.dat
\c # do something with something.dat
\c Delete $0

\S2{searchpath} SearchPath

\c user_var(output) filename

Assign to the user variable $x, the full path of the file named by the second parameter. The error flag will be set and $x will be empty if the file cannot be found. Uses \W{http://msdn.microsoft.com/en-us/library/aa365527}{SearchPath()} to search the system paths for the file.

\S2{setfileattributes} SetFileAttributes

\c filename attribute1|attribute2|...

Sets the file attributes of 'filename'. Valid attributes can be combined with | and are:

\b \e{NORMAL} or \e{FILE_ATTRIBUTE_NORMAL} (you can use 0 to abbreviate this)

\b \e{ARCHIVE} or \e{FILE_ATTRIBUTE_ARCHIVE}

\b \e{HIDDEN} or \e{FILE_ATTRIBUTE_HIDDEN}

\b \e{OFFLINE} or \e{FILE_ATTRIBUTE_OFFLINE}

\b \e{READONLY} or \e{FILE_ATTRIBUTE_READONLY}

\b \e{SYSTEM} or \e{FILE_ATTRIBUTE_SYSTEM}

\b \e{TEMPORARY} or \e{FILE_ATTRIBUTE_TEMPORARY}

The error flag will be set if the file's attributes cannot be set (i.e. the file doesn't exist, or you don't have the right permissions). You can only set attributes. It's not possible to unset them. If you want to remove an attribute use NORMAL. This way all attributes are erased. This command doesn't support wildcards.

\S2{regdll} RegDLL

\c dllfile [entrypoint_name]

Loads the specified DLL and calls DllRegisterServer (or entrypoint_name if specified). The error flag is set if an error occurs (i.e. it can't load the DLL, initialize OLE, find the entry point, or the function returned anything other than ERROR_SUCCESS (=0)).

Use \R{setoutpath}{SetOutPath} to set the current directory for DLLs that depend on other DLLs that are now in the path or in the Windows directory. For example, if foo.dll depends on bar.dll which is located in $INSTDIR use:

\c  SetOutPath $INSTDIR
\c  RegDLL $INSTDIR\foo.dll

\S2{unregdll} UnRegDLL

\c dllfile

Loads the specified DLL and calls DllUnregisterServer. The error flag is set if an error occurs (i.e. it can't load the DLL, initialize OLE, find the entry point, or the function returned anything other than ERROR_SUCCESS (=0)).
