ACC: Change Active Control Background Color with Timer Event
ID: Q141535
|
The information in this article applies to:
-
Microsoft Access versions 2.0, 7.0, 97
SUMMARY
Advanced: Requires expert coding, interoperability, and multiuser skills.
This articles demonstrates a method that you can use to change the
background color of the active control on a form. This method will
change the background color of any active control that supports the
BackColor property.
This article assumes that you are familiar with Visual Basic for
Applications and with creating Microsoft Access applications using the
programming tools provided with Microsoft Access. For more information
about Visual Basic for Applications, please refer to your version of the
"Building Applications with Microsoft Access" manual.
NOTE: Visual Basic for Applications is called Access Basic in Microsoft
Access version 2.0. For more information about Access Basic, please refer
to the "Building Applications" manual.
MORE INFORMATION
To create the method that changes the background color of the active
control on a form, follow these steps.
CAUTION: Following the steps in this example will modify the sample
database Northwind.mdb (or NWIND.MDB in version 2.0). You may want to back
up the Northwind.mdb (or NWIND.MDB) or perform these steps on a copy of the
Northwind database.
- Open the sample database Northwind.mdb.
- Click the Module tab, and then click New.
- In the Declarations section of the module type the following line:
Global myctrname as String
- Save the module as Module1, and then close the module.
- Open the Customers form in Design view.
- Set the OnTimer property of the Customers form to the following event
procedure:
Private Sub form_Timer () ' In Microsoft Access 2.0, the word
' "Private" will not appear in this
' line of the code.
Dim lngYellow As Long, lngWhite As Long
On Error GoTo Errhandler
lngYellow = RGB(255, 255, 0) 'Set lngYellow variable for
'yellow color.
lngWhite = RGB(255, 255, 255) 'Set lngWhite variable for white
'color.
If Screen.ActiveControl.Name <> myctrname Then ' If active
' control not
' equal to
' myctrname do
' next line.
Me(myctrname).BackColor = lngWhite ' Set myctrname
' variable to white
' BackColor.
Screen.ActiveControl.BackColor = lngYellow ' Set active color
' BackColor to
' yellow.
myctrname = Screen.ActiveControl.Name ' Set myctrname
' variable to
' active control
' name.
End If
Exit Sub
Errhandler:
If Err = 2465 Then ' If error is 2465 which is "Object-defined
' error."
Resume Next ' Resume running on next line after error.
ElseIf Err = 2474 Then ' If error is 2474 which is "No Control is
' active."
Resume Next
Else
MsgBox Err & " " & Error ' Show Error number and string of error
' value.
Exit Sub
End If
End Sub
- Set the TimerInterval property of the Customers form to 200.
- View the Customers form in Form view. Press TAB to move from one control
to another. Note that the background color changes from white to yellow
for each control that receives the focus.
REFERENCES
For more information about this topic, search for "backcolor," and then
"Change the background color of a control or section" using the Microsoft
Access 97 Help Index.
NOTE: The TimerInterval property uses milliseconds (1000 = One second).
Smaller numbers produce quicker responses. You may have to experiment with
the numbers to achieve the desired effect.
Additional query words:
Keywords : kbusage PgmObj
Version : WINDOWS:2.0,7.0,97
Platform : WINDOWS
Issue type : kbhowto