ActiveControl Property
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ActiveControl Property

Visual Studio .NET 2003

References the active control on an object. Not available at design time; read-only at run time.

Object.ActiveControl.Property[ = Value]

Property Values

Property
The property to return or set.
Value
The current or new property value.

Remarks

This property is not available if all controls on the specified object are invisible or disabled.

If the object is active, the ActiveControl property references the control that has the focus. If the object is not active, an error occurs.

Example

The following example uses the ActiveControl property to show which control on a Form has focus. Note that Grids are containers, and they require code to determine the current ActiveControl within the Grid.

m.cTalk=SET("TALK")
SET TALK OFF

PUBLIC oTlb
oTlb = NEWOBJECT("tlbDemo")
oTlb.SHOW

PUBLIC oFrmDemo
oFrmDemo=NEWOBJECT("frmDemo")
oFrmDemo.SHOW

READ EVENTS

RELEASE oTlb
RELEASE oFrmDemo
SET TALK &cTalk

RETURN

DEFINE CLASS tlbDemo AS TOOLBAR

    HEIGHT = 31
    LEFT = 30
    TOP = 30
    WIDTH = 149
    NAME = "tlbDemo"
    CONTROLBOX = .F.

    ADD OBJECT cmdShowControl AS COMMANDBUTTON WITH ;
        TOP = 5, ;
        LEFT = 5, ;
        HEIGHT = 22, ;
        WIDTH = 100, ;
        CAPTION = "ActiveControl?", ;
        NAME = "cmdShowControl"

    ADD OBJECT sepSeparator1 AS SEPARATOR WITH ;
        TOP = 5, ;
        LEFT = 80, ;
        HEIGHT = 0, ;
        WIDTH = 0, ;
        NAME = "sepSeparator1"

    ADD OBJECT cmdExit AS COMMANDBUTTON WITH ;
        TOP = 5, ;
        LEFT = 80, ;
        HEIGHT = 22, ;
        WIDTH = 34, ;
        CAPTION = "Exit", ;
        NAME = "cmdExit"

    PROCEDURE cmdShowControl.CLICK
        DO ShowControl
    ENDPROC

    PROCEDURE cmdExit.CLICK
        CLEAR EVENTS
    ENDPROC

ENDDEFINE

DEFINE CLASS frmDemo AS FORM

    DOCREATE = .T.
    CAPTION = "Demo Form"
    NAME = "frmDemo"
    LEFT = 60
    TOP = 100

    ADD OBJECT cmdClose AS COMMANDBUTTON WITH ;
        TOP = 200, ;
        LEFT = 264, ;
        HEIGHT = 27, ;
        WIDTH = 84, ;
        CANCEL = .T., ;
        CAPTION = "Close", ;
        DEFAULT = .T., ;
        TABINDEX = 4, ;
        NAME = "cmdClose"

    ADD OBJECT grdNames AS GRID WITH ;
        COLUMNCOUNT = 2, ;
        DELETEMARK = .F., ;
        HEIGHT = 128, ;
        LEFT = 12, ;
        PANEL = 1, ;
        RECORDSOURCE = "names", ;
        SPLITBAR = .F., ;
        TABINDEX = 3, ;
        TOP = 48, ;
        WIDTH = 344, ;
        NAME = "grdNames", ;
        Column1.CONTROLSOURCE = "names.cname", ;
        Column1.WIDTH = 222, ;
        Column1.NAME = "Column1", ;
        Column2.CONTROLSOURCE = "names.nvalue", ;
        Column2.NAME = "Column2"

    ADD OBJECT txtName AS TEXTBOX WITH ;
        CONTROLSOURCE = "names.cname", ;
        HEIGHT = 24, ;
        LEFT = 56, ;
        TABINDEX = 2, ;
        TOP = 12, ;
        WIDTH = 125, ;
        NAME = "txtName"

    ADD OBJECT lblNameLabel AS LABEL WITH ;
        CAPTION = "Name:", ;
        HEIGHT = 17, ;
        LEFT = 16, ;
        TOP = 16, ;
        WIDTH = 40, ;
        TABINDEX = 1, ;
        NAME = "lblNameLabel"

    PROCEDURE LOAD
        CREATE CURSOR names (cname C(40), nvalue N(19,2))
        INSERT INTO names VALUES('Thomas',12.5)
        INSERT INTO names VALUES('Jerry',18.2)
        INSERT INTO names VALUES('Andrew',9.2)
        GO TOP
    ENDPROC

    PROCEDURE INIT
        THIS.grdNames.Column1.Header1.CAPTION = "Name"

        WITH THIS.grdNames.Column1.Text1
            .BORDERSTYLE = 0
            .MARGIN = 0
        ENDWITH

        THIS.grdNames.Column2.Header1.CAPTION = "Value"
        WITH THIS.grdNames.Column2.Text1
            .BORDERSTYLE = 0
            .MARGIN = 0
        ENDWITH

    ENDPROC

    PROCEDURE cmdClose.CLICK
        THISFORM.RELEASE
    ENDPROC

    PROCEDURE grdNames.AFTERROWCOLCHANGE
        LPARAMETERS nColIndex
        THISFORM.REFRESH
    ENDPROC

    PROCEDURE txtName.VALID
        THISFORM.grdnames.REFRESH
    ENDPROC
    
ENDDEFINE

PROCEDURE ShowControl
IF TYPE("_Screen.ActiveForm.ActiveControl")=="O"
    LOCAL loActiveControl
    m.loActiveControl = _SCREEN.ACTIVEFORM.ACTIVECONTROL
    IF m.loActiveControl.BASECLASS = "Grid"
        m.loActiveControl = ;
            EVALUATE("m.loActiveControl.Columns(m.loActiveControl.ActiveColumn)." + ;
            m.loActiveControl.COLUMNS(m.loActiveControl.ACTIVECOLUMN).CURRENTCONTROL)
    ENDIF
    m.cObjHierarchy=UPPER(SYS(1272,m.loActiveControl))
    WAIT WINDOW AT 4,30 "_SCREEN.ActiveForm.ActiveControl = "+m.cObjHierarchy NOWAIT
ELSE
    WAIT WINDOW AT 4,30 "There is no ActiveControl; there is no ActiveForm" NOWAIT
ENDIF
ENDPROC

See Also

ActiveForm Property

Applies To: Container Object | Form Object | Page Object | _SCREEN | ToolBar Object

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