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CONTROL
Types of Control Functions
An overview of the types of functions distinguished within Control.
Connection Functions
Connection functions can be used to establish connections to alerts, data points and system events.

CONTROL
- Introduction to CTRL
  An introduction to the product's own programming language Control(CTRL).
- CONTROL Classes
- 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 data points and respond to alerts and changes to alerts.
  - Blob Functions
  - Communication Functions
  - Connection Functions
    Connection functions can be used to establish connections to alerts, data points and system events.
    - alertConnect()
      Registers the function work() for call with resulting alerts.
    - Class Event Functions
    - dpConnect()
      Calls a callback function whenever the passed data point values/attributes change.
    - dpConnectExt()
      The function calls a callback function if the passed data point values/attributes change.
    - dpConnectExtUserData()
      Calls a callback function on data change of the defined data point values/attributes and passes them to it. In contrast to ControlA_D/dpConnectExt.html, this function also allows you to pass any data to the callback function.
    - dpConnectUserData()
      Calls a callback function on data change of the defined data point values/attributes and passes them to it. In contrast to dpConnect(), this function allows you to also pass any data to the callback function.
    - dpQueryConnectAll()
      The function dpQueryConnectAll subscribes to attributes of configs from multiple Data Point Elements, which meet a certain query condition. When a subscribed attribute changes, a callback function (“work” function) is executed. The event manager will always send all subscribed elements, even if only one changes. Therefore update messages will always contain all subscribed elements.
    - dpQueryConnectSingle()
      The function dpQueryConnectSingle subscribes to attributes of configs from multiple Data Point Elements, which meet a certain query condition. When a subscribed attribute changes, a callback function (“work” function) is executed. The Event Manager will send every single change separately, so update messages will normally contain only one element. If however several of the subscribed attributes are changed together within one message (i.e. in one dpSet() function call), then these will be all be forwarded in one message to the subscribing work function. Additionally, the execution of the work function can be delayed with the optional parameter blockingTime to accumulate more changes, increasing performance.
    - sysConnect()
      The function allows to connect to specific system events.
    - sysConnectUserData()
      The function allows to connect to specific system events.
  - Crypthographic Functions
  - Database Functions
  - Data point Functions
  - Error Functions
  - File Functions
  - Graphics Functions
  - 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
  - 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
- CTRL Debugger
  With the CTRL Debugger you can debug the programming language Control.
- CtrlExtension
  The CtrlExtension allows the addition of custom C++ code.
- CTRLPPCheck
  Save time and money with increased code quality in your projects

Connection Functions

Connection functions can be used to establish connections to alerts, data points and system events.

Note:

When a variable or object goes out of scope, its associated callback objects will also stop being executed.

For instance, this applies if an object that contained the connection function, has been deconstructed.