Withevents Overhead

[MatDavies]

I am using a variable declared using withevents to monitor when a form closes, so I can then close some other forms that are essentially children of the first form.
What I would like to know is what sort of overhead is involved in using withevents? will it make much of an impact on performance?

thanks in advance

Matt

 

[johnwm]

To unload other forms, I usually just stick the close and tidy up code in the first Forms QueryUnload event Let me know if this helps
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[MatDavies]

The problem with that way is that the same form is used in different ways with different forms. The same child form could be opened for three or four parent forms. with out having a object variable pointing to the instance of this form how would I know which instance to close?

any suggestions are welcome.

Matt

 

[CCLINT]

A child form should be loaded and unloaded by it's parent from, with-in the parent form-class:

myMDIForm

Private mnuOpenForm1_Click()
Dim f As New Form1
f.Show
End Sub
Private Sub MDIForm_QueryUnload(Cancel As Integer, UnloadMode As Integer)
Dim f As Form
For Each f In VB.Forms
Unload f
Next f
End Sub


Form1:

Option Explicit
Private myChild As myChildForm

Private Sub Form_Load()
Set myChild = New myChildForm
Load myChild
End Sub

Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
Unload myChild
Set myChild = Nothing
End Sub [/b][/i][/u]*******************************************************
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[MatDavies]

Unfortunately I am just bug fixing an existing application. I would prefer to do it the way CCLINT has suggested, but because of limitations imposed by the way the application has been written I can't. The best I can do is get a reference to the parent form due to a global variable that is set when each form opens. That is why I have done it the way I have. A major re-write is planned but until then I need a 'quick fix' that won't slow the system down too much. This is why I wanted to know what sort of overhead withevents imposes.

Thanks for your answers though.

Matt