Why does Showing a UserForm as Modal Stop Code Exe

问题:

The following VBA code stops at Me.Show. From my tests, it seems that Me.Show stops all code execution, even if the code is inside the UserForm.

This part is outside the UserForm:

Public Sub TestProgress()  
    Dim objProgress As New UserForm1
    objProgress.ShowProgress
    Unload objProgress
End Sub

This part is inside the UserForm:

Private Sub ShowProgress()
    Me.Show vbModal
    Dim intSecond As Integer
    For intSecond = 1 To 5
        Application.Wait Now + TimeValue("0:00:01")
        Me.ProgressBar1.Value = intSecond / 5 * 100
    Next intSecond
    Me.Hide
End Sub

The code stops at Me.Show, after the UserForm is displayed. There is no error, it just discontinues executing code. It seems that the only way to execute code inside a modal UserForm in VBA is to include it in the UserForm_Activate procedure like this:

This part is outside the UserForm:

Public Sub TestProgress()  
    Dim objProgress As New UserForm1
    Load objProgress
    Unload objProgress
End Sub

This part is inside the UserForm:

Private Sub UserForm_Initialize()
    Me.Show vbModal
End Sub

Private Sub UserForm_Activate()
    Dim intSecond As Integer
    For intSecond = 1 To 5
        Application.Wait Now + TimeValue("0:00:01")
        Me.ProgressBar1.Value = intSecond / 5 * 100
    Next intSecond
    Me.Hide
End Sub

Of course, I can't put Me.Show inside UserForm_Activate because that procedure only fires after the UserForm Show event.

The documentation for UserForm.ShowModal says "When a UserForm is modal, the user must supply information or close the UserForm before using any other part of the application. No subsequent code is executed until the UserForm is hidden or unloaded."

I am trying to use a modal UseForm as a progress bar to prevent the user from interacting with the application while a process runs. But this will be difficult to accomplish if all my code has to be within the UserForm_Activate procedure.

Am I missing something here? Why does all code execution stop at Me.Show?

回答1:

When the form is displayed with vbModal, the code will suspend execution and wait for user interaction with the form. For example clicking a button or using a dropdown.

If you update the form property

ShowModal = False

and remove vbModal from your code. This will allow code execution to continue when the form is displayed.

回答2:

I was searching for an answer to why I was getting the following error:

Run time error '5': Invalid procedure call or argument

when running this line of code:

UserForm1.Show True

even though this line works:

UserForm1.Show False

Of course. True is not the same as vbModal! So the simple answer is to use the correct enumerations:

UserForm1.Show vbModal
UserForm1.Show vbModeless

回答3:

I think I figured this out.

After Me.Show the UserForm_Activate event fires. If there is no code in the UserForm_Activate procedure nothing will happen because VBA is waiting for Me.Hide.

So the order of events is: Me.Show > UserForm_Activate > Me.Hide

Any code that I want to run must be in the UserForm_Activate procedure and must be before Me.Hide.

The structure is very strict, but I may be able to use that structure to my advantage.

回答4:

I think i figured it out Try doing this simple step In you form right click on the bank portion and click properties Change the "ShowModal" to False or in VBA code when you show the userform using the following code:

UserForm1.Show False

回答5:

I don't really know whats going into your mind because there are a wide variety of code for what your are asking but i hope that this can help

Private Sub cmdSwitch_Click() UserForm1.Hide UserForm2.Show

End Sub