CONTROL
- Introduction to CTRL
- CONTROL Classes
- Types of Control Functions
- CONTROL graphics
- CONTROL Functions
  - Funtions A
  - Funtions B
  - Funtions C
    - callFunction()
      Calls a specific function. The parameters of the called function are passed as parameters in callFunction().
    - captureScreen() - obsolete
      Returns an IDispatch (IPicture) image of the screen. (obsolete from version 3.5).
    - ceil()
      Rounds up to an integer.
    - certificateAcceptPermanently()
      The function marks the given digest as "permanently accepted" and stores this information on the hard disk.
    - certificateIsPermanentlyAccepted()
      The function certificateIsPermanentlyAccepted() returns TRUE if the given certificate was already permanently accepted, e.g. by the user.
    - changeLang()
      Function for switching the language at runtime in a user interface.
    - checkLicenseOption()
      The function checkLicenseOption() allows you to check the number of available licenses for the specified WinCC OA license option.
    - checkPassword()
      Checks the assignment of a password to the user id.
    - checkPattern()
      Compares a bit32/bit64 variable with a pattern.
    - checkQuery()
      Checks the syntax of a query.
    - checkScript()
      Checks the syntax of a script.
    - checkStringFormat()
      The function checks, wether the string 'value' is according the format in 'format' (for example, "%5.4f").
    - childPanel()
      Opens a child panel without connection to the Event Manager.
    - ChildPanelOn()
      Opens a child panel.
    - ChildPanelOnCentral()
      Opens a child panel centered in the calling parent panel.
    - ChildPanelOnCentralModal()
      Opens a modal child panel centered in the calling parent panel.
    - ChildPanelOnCentralModalReturn()
      Opens a modal child panel, with return value, centered in the calling parent panel.
    - ChildPanelOnCentralReturn()
      Opens a child panel with return value centered in the calling parent panel.
    - ChildPanelOnModal()
      Opens a modal child panel at the position x, y.
    - ChildPanelOnModalReturn()
      Opens a modal child panel with return values at the position x,y.
    - ChildPanelOnModule()
      Opens a child panel in an arbitrary module.
    - ChildPanelOnModuleCheckPos()
      Opens a child panel and also checks the validity of the position and size.
    - ChildPanelOnModuleModal()
      Opens a modal child panel in the module "ModuleName".
    - ChildPanelOnModuleModalReturn()
      Opens a modal child panel in the module "ModuleName" with a return value.
    - ChildPanelOnModuleReturn()
      Opens a child panel in the module "ModuleName" with return values.
    - ChildPanelOnParent()
      Opens a child panel in the specified panel.
    - ChildPanelOnParentModal()
      Opens a modal child panel in the specified panel.
    - ChildPanelOnParentModalReturn()
      Opens a modal child panel in the specified panel with return values.
    - ChildPanelOnParentReturn()
      Opens a child panel in the specified panel with return values.
    - ChildPanelOnRelativ()
      Opens a child panel relative to the calling object.
    - ChildPanelOnRelativModal()
      Opens a modal child panel relative to the calling object.
    - ChildPanelOnRelativModalReturn()
      Opens a modal child panel relative to the calling object, with a return value.
    - ChildPanelOnRelativReturn()
      Opens a child panel with a return value, relative to the calling object.
    - ChildPanelOnReturn()
      Opens a child panel with return values.
    - ChildPanelReturnValue()
      Opens a child panel of a particular type with a return value.
    - clearLastError()
      Allows to clear the last error which has been raised in WinCC OA.
    - clearLogViewer()
      Allows to clear the log viewer by script.
    - closeDialog()
      Closes its own dialog for simple configuration.
    - closeProgressBar()
      The function closes the module for the progress bar.
    - colorDblsWritable()
      The function returns True when UI manager may change the colorDB.
    - colorEditor()
      Opens the color editor and writes the names of the color to colstr.
    - colorGet()
      A color scheme is a collection of colorDB files located in a subdirectory of proj_path/colorDB, for example, WinCC_OA_proj_path/colorDB/DayScheme/colors. Hence, the name of the schema is "DaySchema" - the name of the directory. The function colorGet() returns a blink or an RGB definition of a color from a desired colorDB file.
    - colorGetActiveScheme()
      A color scheme is a collection of colorDB files located in a subdirectory of proj_path/colorDB, for example, proj_path/colorDB/DayScheme/colors. Hence, the name of the schema is "DaySchema" - the name of the directory. The function colorGetActiveScheme returns the active color scheme.
    - colorGetAlias()
      A color scheme is a collection of colorDB files located in a subdirectory of proj_path/colorDB, for example, WinCC_OA_proj_path/colorDB/DayScheme/colors. Hence, the name of the schema is "DaySchema" - the name of the directory. The function colorGetAlias() returns the color name of an alias from a desired colorDB file.
    - colorRemove()
      A color scheme is a collection of colorDB files located in a subdirectory of proj_path/colorDB, for example, proj_path/colorDB/DayScheme/colors. Hence, the name of the schema is "DayScheme" - the name of the directory. The function "colorRemove" deletes a color or alias definition from a colorDB file.
    - colorSet()
      A color scheme is a collection of colorDB files located in a subdirectory of proj_path/colorDB, for example, WinCC_OA_proj_path/colorDB/DayScheme/colors. Hence, the name of the schema is "DaySchema" - the name of the directory. The function colorSet() specifies a color in the specified colorDB file.
    - colorSetActiveScheme ()
      A color scheme is a collection of colorDB files located in a subdirectory of proj_path/colorDB, for example, proj_path/colorDB/DayScheme/colors. Hence, the name of the schema is "DayScheme" - the name of the directory. The function colorSetActiveScheme sets the active color scheme.
    - colorSetAlias()
      A color scheme is a collection of colorDB files located in a subdirectory of proj_path/colorDB, for example, WinCC_OA_proj_path/colorDB/DayScheme/colors. Hence, the name of the schema is "DaySchema" - the name of the directory. The function colorSetAlias() specifies an alias for a color in a colorDB file.
    - colorToRgb()
      The function retrieves the RGB values from the given color.
    - commonConfirm()
      Causes an acknowledge all of all the panels in the module "modulName".
    - confirmMode()
      Switches the module to individual acknowledge mode.
    - connectedShapes()
      Sets graphics objects where the function dpConnect() is active to a particular color for a certain time. All graphics objects that are connected to DPs are therefore displayed.
    - constructor
      Instances a new object of type MindSphereAsset.
    - convManIdToInt()
      Returns an integer that corresponds to the ManagerIdentifier.
    - convManIntToName()
      Converts an integer, which corresponds to the manager identifier, to manager name.
    - 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.
    - cos()
      Calculates the cosine.
    - cosh()
      Returns the hyperbolic cosine of an angle.
    - createAnimation()
      With the function you can create more complex animations. To create an animation group, call this function.
    - createNotification()
      The function creates a notification.
    - createPanel()
      Creates an (empty) panel file in a defined size (width and height) named "filename".
    - createQRCodeFile()
      Creates a QR code file.
    - createSymbol()
      Adds a panel references in a panel or layout at a later time during run time. The function is identical to addSymbol() but prevents the triggering of the added objects initialize scripts.
    - createUuid()
      This function allows to create Universally Unique Identifiers (UUID).
    - crypt()
      Encrypts the transferred text.
    - cryptoHash()
      Allows to create a checksum for a string or blob element.
    - cssLengthToPixel()
      Calculates the lenght of a given font in pixel.
  - Funtions D
  - Functions E
  - Functions F
  - Functions G
  - Functions H
  - Functions I
  - Functions J
  - Functions K
  - Functions L
  - Functions M
  - Functions N
  - Functions O
  - Functions P
  - Functions Q
  - Functions R
  - Functions S
  - Functions T
  - Functions U
  - Functions V
  - Functions W
  - Functions X
  - Functions Y
  - Functions Z
- CTRL-Debugger
  Der CTRL-Debugger ermöglicht ein Debuggen der Pogrammiersprache Control.

clearLastError()

Allows to clear the last error which has been raised in WinCC OA.

Synopsis

int clearLastError();

Parameter


Parameter	Description
-	-

Return Value

The function always returns 0.

Errors

Missing or wrong arguments.

Description

The function clears the last error that has been raised. It is a counterpart to the functions makeError() and throwError().

Allocation

CTRL

Availability

CTRL