CONTROL
- Introduction to CTRL
- CONTROL Classes
- Types of Control Functions
- Control graphics
  - Graphics objects
  - Attributes of graphics objects
  - Panel functions
  - Reference Functions
  - Arc
  - AttentionEffect EWO functions
  - Bar trend
  - BarChart3D EWO
  - Button
  - Chart.ewo
  - Calendar
    - "acceptDrops"
      Specifies whether drop events are enabled for this object.
    - "dateEditAcceptDelay"
      Defines after which time an inactive date edit is shown before its contents are accepted.
    - firstDayOfWeek"
      Allows to define the day which shall be shown as first day of week.
    - "focus"
      The attribute "focus"; returns TRUEif the object has the focus.
    - "font"
      Sets the font of an object.
    - "gridVisible"
      Allows to define if grid lines shall be displayed between calendar days.
    - "horizontalHeaderFormat"
      Defines the format for the calendar widget's horizontal header.
    - "isActiveWindow"
      The attribute "isActiveWindow"; returns TRUE if this widget is the active window, otherwise FALSE.
    - "layoutDirection"
      Defines the widget's layout direction.
    - maximumDate"
      Defines the maximum selectable date for the Calendar / DateTimeEdit widget.
    - "minimumDate"
      Defines the minimum selectable date for the Calendar / DateTimeEdit widget.
    - "monthShown";
      Returns the currently displayed month. Months are numbered from 1 to 12.
    - "navigationBarVisible"
      This attribute allows to define if the navigation bar for selecting month and year is displayed.
    - selectedDate"
      This property holds the selected date.
    - "setCurrentPage"
      Displays the given month of the given year without changing the selected date.
    - "showNextMonth"
      Shows the next month relative to the currently displayed month. Note that the selected date is not changed.
    - "showNextYear"
      Shows the currently displayed month in the next year relative to the currently displayed year. Note that the selected date is not changed.
    - "showPreviousMonth"
      Shows the previous month relative to the currently displayed month. Note that the selected date is not changed.
    - "showPreviousYear"
      Shows the currently displayed month in the previous year relative to the currently displayed year. Note that the selected date is not changed.
    - "showSelectedDate"
      Shows the year, month and day of the selected date.
    - "showToday"
      Shows the year, month and day of the today's date.
    - "tooltipDuration"
      Specifies how long a tooltip is shown.
    - "updatesEnabled"
      This attribute specifies whether updates of a widget (for example, a textEdit, slider, progress bar, zoom navigator, LCD number or thumb wheel) have been enabled.
    - "verticalHeaderFormat"
      Defines the format for the calendar widget's vertical header.
    - "x", "y"
      The attributes x and y return the coordinate of an object (e.g. a textEdit, a progress bar, a slider, a zoom navigator, an LCD number or a thumb wheel). x returns the X coordinate of an object. y returns the Y coordinate of an object.
    - "yearShown"
      Returns the year of the currently displayed month.
  - Cascade
  - Checkbox
  - Clock
  - Combobox
  - DateTimeEdit EWO functions
  - DialGauge EWO
  - DoubleSpinbox EWO
  - DpTreeView
  - DpTypeView
  - Embedded module
  - Frame
  - GIS Viewer EWO
    WinCC OA GIS Viewer provides the cartographic representation of objects in WinCC OA. This new feature provides numerous advantages, particularly in geographical distributed systems, like in Water, Traffic, Oil & Gas or Energy.
  - Label Functions
  - Layoutgroup functions
  - LCD number
  - Maps Widget - Properties and Functions
  - PDF Viewer EWO
  - PictureFlow EWO functions
  - Pipe
  - Polyline
  - Primitive text
  - Progress bar
  - Radio box
  - Rectangle
  - Reference Functions
  - Scheduler.ewo
  - Selection list
  - Slider
  - Spin button
  - Splitter
  - Tab
  - Table
  - TextEdit
  - Text field
  - Thumb wheel
  - ToggleSwitch EWO
  - Tree widget
  - Trend
  - WebView EWO
  - Zoom Navigator
    Functions available for the Zoom Navigator widget.
- CONTROL Functions
- CTRL Debugger
  With the CTRL Debugger you can debug the programming language Control.
- CtrlExtension, basics
- CTRLPPCheck
  Save time and money with increased code quality in your projects

"showPreviousMonth"

Shows the previous month relative to the currently displayed month. Note that the selected date is not changed.

Synopsis

shape.showPreviousMonth();

Parameters


Parameter	Description
shape	Name of the object

Description

Shows the previous month relative to the currently displayed month. Note that the selected date is not changed.

"showPreviousMonth"

Synopsis

Parameters

Description

Assignment