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Visible Property

Visual Studio .NET 2003

Specifies whether an object is visible or hidden. Available at design time and run time.

Object.Visible[ = lExpr]

Property Values

lExpr
The settings for the Visible property are:
Setting Description
True (.T.) The default in the Form Designer. The object is visible.
False (.F.) The default in program code. The object is hidden.

Remarks

Setting the Visible property for the _SCREEN system variable in versions of Visual FoxPro for Windows prior to version 5 has no effect.

Even if the object is hidden, it can still be accessed in code.

To hide an object at startup, set the Visible property to false (.F.) at design time. If you set the Visible property in code, you can hide an object and display it at run time in response to a particular event.

When a form's Visible property is set to false (.F.), the form is hidden and the last-active form set, form, or other object becomes active. When a form's Visible property is set to true (.T.), the form becomes visible. Setting a form's Visible property to true (.T.) does not affect the form's Order property setting. The form does not become active when Visible is set to true (.T.). Use the Show method to activate a form and make it visible in the same step.

Note   If the Visible property of a form is set to false (.F.), the form isn't displayed, even if the form set's Visible property is set to true (.T.). However, if the form set's Visible property is set to false (.F.), all forms contained in the form set are invisible.

Example

The following example demonstrates how the Visible property is used to display controls after they have been added to a form with the AddObject method.

The AddObject method is used to add a Line control and three command buttons to the form. The Visible property is set to true (.T.) for the Line control and the command buttons, displaying them on the form. The Visible property is also used to hide the Line control before its slant direction is changed, and to display the Line control after its slant direction is changed.

frmMyForm = CREATEOBJECT('Form')  && Create a form
frmMyForm.Closable = .F.  && Disable the window pop-up menu

frmMyForm.AddObject('shpLine','Line')  && Add a Line control to the form
frmMyForm.AddObject('cmdCmndBtn1','cmdMyCmndBtn1')  && Up Cmnd button
frmMyForm.AddObject('cmdCmndBtn2','cmdMyCmndBtn2')  && Down Cmnd button
frmMyForm.AddObject('cmdCmndBtn3','cmdMyCmndBtn3')  && Quit Cmnd button

frmMyForm.shpLine.Visible = .T.  && Make Line control visible
frmMyForm.shpLine.Top = 20  && Specify Line control row
frmMyForm.shpLine.Left = 125  && Specify Line control column

frmMyForm.cmdCmndBtn1.Visible =.T.  && Up Command button visible
frmMyForm.cmdCmndBtn2.Visible =.T.  && Down" Command button visible
frmMyForm.cmdCmndBtn3.Visible =.T.  && Quit Command button visible

frmMyForm.SHOW  && Display the form
READ EVENTS  && Start event processing

DEFINE CLASS cmdMyCmndBtn1 AS COMMANDBUTTON  && Create Command button
   Caption = 'Slant \<Up'  && Caption on the Command button
   Left = 50  && Command button column
   Top = 100  && Command button row
   Height = 25  && Command button height
   
   PROCEDURE Click
      ThisForm.shpLine.Visible = .F.  && Hide the Line control
      ThisForm.shpLine.LineSlant ='/'  && Slant up
      ThisForm.shpLine.Visible = .T.  && Show the Line control
ENDDEFINE

DEFINE CLASS cmdMyCmndBtn2 AS CommandButton  && Create Command button
   Caption = 'Slant \<Down'  && Caption on the Command button
   Left = 200  && Command button column
   Top = 100  && Command button row
   Height = 25  && Command button height

   PROCEDURE Click
      ThisForm.shpLine.Visible = .F.  && Hide the Line control
      ThisForm.shpLine.LineSlant ='\'  && Slant down
      ThisForm.shpLine.Visible = .T.  && Show the Line control
ENDDEFINE

DEFINE CLASS cmdMyCmndBtn3 AS CommandButton  && Create Command button
   Caption = '\<Quit'  && Caption on the Command button
   Cancel = .T.  && Default Cancel Command button (Esc)
   Left = 125  && Command button column
   Top = 150  && Command button row
   Height = 25  && Command button height

   PROCEDURE Click
      CLEAR EVENTS  && Stop event processing, close form
ENDDEFINE

See Also

Show Method | ZOrder Method

Applies To: CheckBox | Column | ComboBox | CommandButton | CommandGroup | Container Object | Control Object | EditBox | Form | FormSet | Grid | Image | Label | Line | ListBox | OLE Bound Control | OLE Container Control | OptionButton | OptionGroup | PageFrame | Project Object | _SCREEN | Shape | Spinner | TextBox | ToolBar

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