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Business Logic / Control
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Types of Control Functions
An overview of the types of functions distinguished within Control.
File Functions
File functions allow you to import, export, open, close, and manipulate files within the application. This topic describes how to use file functions and important considerations for cross-platform compatibility.

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Business Logic / Control
Endlose Möglichkeiten in der Datenverarbeitung für Ihre Projekte.
- Introduction to CTRL
  An introduction to the product's own programming language Control(CTRL).
- Control Classes
  The overview of classes available in Control.
- Types of Control Functions
  An overview of the types of functions distinguished within Control.
  - 32/64 bit Functions
  - Administration of Managers, Modules and Panels - Functions
  - Alert Handling Functions
    These functions are associated with datapoints and respond to alerts and changes to alerts.
  - Blob Functions
  - Communication functions
  - Connection Functions
    Connection functions can be used to establish connections to alerts, datapoints and system events.
  - Crypthographic Functions
  - Database Functions
  - Datapoint Functions
  - DirectWrite für SPS (OPC UA-Treiber)
    Dieses Kapitel bietet einen Überblick über die DirectWrite-Funktion für SPS (OPC UA-Treiber)
  - Error Functions
  - File Functions
    File functions allow you to import, export, open, close, and manipulate files within the application. This topic describes how to use file functions and important considerations for cross-platform compatibility.
    - abortFileTransfer()
      The function abortFileTransfer() aborts all file transfers of the stated manager.
    - access()
      Queries the access mode of the file or directory with the specified path name.
    - baseName()
      The function returns the last part of a file path.
    - byteSizeToString()
      Converts a filesize in bytes to a string (for example, with getFileSize()).
    - copyAllFiles()
      Copies all the files of the specified directory to a new directory.
    - copyAllFilesRecursive()
      Copies files and subdirectories of a directory to a new directory.
    - copyFile()
      Copies the specified source file to the specified target file or to the specified directory.
    - delExt()
      The function deletes the file extension of the specified file.
    - dirName()
      The function returns the directory path for the specified directory.
    - fclose()
      Closes a file.
    - feof()
      Examines whether an end of file has been noted.
    - ferror()
      Examines whether a file error has been noted.
    - fflush()
      Writes data to a file.
    - fgets()
      Returns a string from a file.
    - fileToString()
      This function loads an ASCII file and writes the contents into a string variable.
    - findExecutable()
      The function searches for the given executable and returns the full path to it or an empty string if not found.
    - fopen()
      Opens a file.
    - fprintf()
      Writes to a file.
    - fprintfPL()
      Writes to a file similar to fprintf() except changes to the current WinCC OA language before converting.
    - fprintfUL()
      Writes to a file similar to fprintf() except changes to the current Windows user language before converting.
    - fputs()
      Writes a string to a file.
    - fread()
      Reads a number of bytes from a file to a blob variable.
    - fscanf()
      Reads a file.
    - fscanfPL()
      Reads a file similar to fscanf() except changes to the current WinCC OA language before converting.
    - fscanfUL()
      Reads a file like fscanf(), but change to the current Windows user language before converting.
    - fseek()
      Sets the pointer of the file f from the position whence to the position defined by the offset.
    - ftell()
      The ftell function obtains the current value of the file position indicator for the stream pointed to by f.
    - fwrite()
      Writes a number of bytes from a blob variable to a file.
    - getExt()
      The function returns the file extension.
    - getFileModificationTime()
      The function returns the modification date and time of a file.
    - getFileNames()
      Lists the files or sub directories of a directory.
    - getFileNamesRev()
      Reverse of the function getFileNames().
    - getFileSize()
      The function checks the size of the defined file.
    - getPath()
      This function determines the absolute paths for panels, scripts etc.
    - getPendingFileTransferCount()
      The function getPendingFileTransferCount() returns the number of currently pending file transfers.
    - getYoungerFiles()
      Returns all the files of a directory that has changed since a particular date.
    - isdir()
      The function checks if a specified directory exists.
    - isfile()
      The function tests if a specified file exists.
    - mkdir()
      Creates a directory with a specified name.
    - moveFile()
      Moves the specified file or directory to the target directory.
    - remove()
      The function remove() deletes a file.
    - rename()
      The function renames a file.
    - requestFileList()
      The function requestFileList() requests a file list from the manager with the specified manager Id.
    - requestFileTransfer()
      The function requestFileTransfer() requests a list of files to be transferred from the active to passive partner in a redundant project.
    - rewind()
      Places the pointer at the beginning of the file FileDesc.
    - rmdir()
      The function deletes a specified directory.
    - setFileModificationTime()
      This function sets/changes the last modification date and time of a file.
    - tmpnam()
      Creates temporary file names.
  - Graphics Functions
  - Help Viewer Functions
    Available Functions for the Help Viewer.
  - Input Recording Functions
  - Mapping Functions
  - Mathematical Functions
  - MindSphere Connector Functions
  - Miscellaneous Functions
  - Multilingual Functionality
  - Project administration Functions
  - Query Functions
  - Redu/Dist Functions
  - Reference - Focus Policy Functions
  - Selection and Configuration Dialogs - Functions
  - Semaphore Functions
  - String Functions
  - Funktionen für abonnementbasierte Lizenzen
    CONTROL-Funktionen zum Abfragen von Informationen aus abonnementbasierten Lizenzen.
  - System Tray
  - Time Functions
  - Threads Functions
  - User administration Functions
  - Vector / Dynamic arrays - Functions
  - Waiting Control Functions
  - Window Functions
    This chapter lists all functions used to control windows and panels, such as ChildPanelOn, LayerOn, LayerOff, PanelOff, RootPanelOn, SwitchLayer, ZoomModule, and related dialog and module operations.
  - Window Functions
    This chapter lists all functions used to control windows and panels, such as ChildPanelOn, LayerOn, LayerOff, PanelOff, RootPanelOn, SwitchLayer, ZoomModule, and related dialog and module operations.
  - XML Control Extension Functions
- Control graphics
- CONTROL Functions
- CtrlExtension
  Die CtrlExtension ermöglicht das Hinzufügen von benutzerdefiniertem C++-Code.
- CTRL-Debugger
  Der CTRL-Debugger ermöglicht ein Debuggen der Pogrammiersprache Control. Der Debugger kann über ein eigenes Panel verwendet werden, welches es auch erlaubt die Variablen zu beinflussen, Breakpoints zu setzen, usw.
- SQL in CONTROL
  Mit den Datenbankfunktionen besteht eine Möglichkeit, Werteabfragen von Datenpunkten und -elementen schnell durchzuführen.
- WinCC OA JavaScript Manager für Node.js
  Der WinCC OA JavaScript Manager für Node.js ist ein Manager, welcher die Einbindung der TypeScript/JavaScript Runtime-Umgebung in WinCC OA erlaubt.
- API Manager
  Das API von WinCC OA (Application Programming Interface) bietet eine Reihe von Funktionen, die es ermöglichen, dieses Prozessleitsystem um spezielle Manager zu erweitern.
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File Functions

File functions allow you to import, export, open, close, and manipulate files within the application. This topic describes how to use file functions and important considerations for cross-platform compatibility.

You can use file functions to import and export files, open and close files, and perform other file operations.

File functions that use path specifications handle the paths relative to the WinCC OA PROJ_PATH. An empty string "" is interpreted as PROJ_PATH.

Attention:

When using file functions, remember that Windows file systems are case-insensitive. File and directory names are not affected by letter casing, so function calls may succeed even if the case does not match exactly. In contrast, Linux-based file systems are case-sensitive. Function calls that work on Windows may fail on Linux if the case of file or directory names is not correct. Always use the exact case for file and directory names to ensure compatibility across platforms.