Text box prompt text in Excel VBA

问题:

You know how sometimes you see text in an input field prompting for an answer? When you click it, it goes away, but comes back if you deselect without having typed anything.

How do I accomplish this in an Excel text box? Can this be done at all?

I think I could accomplish this if I attach a click macro to the text box and the macro can be able to tell what text box was clicked, but the problem with the click macro is it won't let you select the object first, so you have no idea what was clicked. And I don't want to hard code the text box name in the click macro code.

回答1:

I think you're referring to a "placeholder" in a UserForm. The two tricks that I use to achieve this are the "tag" property and Enter and Exit events. First, create your sub modules that will fire upon Enter (focus) and Exit (blur).

Sub TB_enter(TB_name)
    If Len(Me.Controls(TB_name).Tag) = 0 Then
        Me.Controls(TB_name).Tag = Me.Controls(TB_name).Value
        Me.Controls(TB_name).Value = vbNullString
    End If
End Sub
Sub TB_exit(TB_name)
    If Len(Me.Controls(TB_name).Value) = 0 Then
        Me.Controls(TB_name).Value = Me.Controls(TB_name).Tag
        Me.Controls(TB_name).Tag = vbNullString
    End If
End Sub

Next, for each instance of your textbox on your userform, double click on the textbox while in View Object mode. This will automatically create a Private Sub for the change event. Head to the upper right hand corner of the toolbar and change the "Change" drop down list to "Enter". This will create a new Private Sub for the Enter event. Repeat this process again, but select "Exit" to create the Exit event. Now, simply copy the following code into the Enter and Exit events respectively (I've used the default name for the first textbox, but this is name independent when calling the events).

Private Sub TextBox1_Enter()
    TB_enter ActiveControl.Name
End Sub
Private Sub TextBox1_Exit(ByVal Cancel As MSForms.ReturnBoolean)
    TB_exit ActiveControl.Name
End Sub

If you are placing these calls in an external module, simply replace "Me" with the name of the UserForm.

回答2:

You could do it with a couple of events. To clear the box on click is pretty easy:

Private Sub TextBox1_GotFocus()
    TextBox1.Text = ""
End Sub

I'd add some other steps, add a worksheet_activate event to set an inital value and set a flag for if the default value is set:

Private Sub Worksheet_Activate()
    Dim textBox1Default As Boolean
    TextBox1.Text = "Please enter some text here"
    textBox1Default = True
End Sub

Then I'd add a TextBox1_Change event to remove the default flag

Private Sub TextBox1_Change()
    If textBox1Default = True Then textBox1Default = False
End Sub

And finally adjust the original GotFocus event to include the flag check:

Private Sub TextBox1_GotFocus()
    If textBox1Default Then TextBox1.Text = ""
End Sub

You'll need to make it work for you, this way if you change tabs it will reset the text but you can have it check that on activate and change it to suit when you want it to reset.

Jesse