Mdiparent ,child forms

Question

I have mdiparent and many child forms im calling a child form as below

     Private Sub tsmQuotation_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tsmQuotation.Click
            If Application.OpenForms().OfType(Of Quotation).Any Then
                 Quotation.WindowState = FormWindowState.Normal
                 Quotation.Focus()
            Else
                 Quotation.MdiParent = Me
                 Quotation.Show()
            End If
     End Sub

my first doubt is: when i declare this Quotation.MdiParent = Me...it takes more time to open the form than without this line. How can i reduce the time to open form..or am I doing anything wrong ?

2nd doubt is: I have place a picturebox in mdiparent's center. and i have sent picturebox to back but then too when i open any child form I see the picturebox above the quotaion .I want to show picture box at back not above any child forms.

Thanks in advance!!!

Answer 1

Without Quotation.MdiParent = Me, the form displayed would not be an MdiChild. It would instead be displaying as a normal form by itself. Try dragging it around the screen and you'll see that it is not confined to the MdiParent form.

See if this loads it any faster, though:

Private Sub tsmQuotation_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tsmQuotation.Click
    If Application.OpenForms().OfType(Of Quotation).Any Then
        Dim Q As Quotation = Application.OpenForms().OfType(Of Quotation).First
        Q.WindowState = FormWindowState.Normal
        Q.Activate()
    Else
        Dim Q As New Quotation
        Q.MdiParent = Me
        Q.Show()
    End If
End Sub

For the second issue, select the MdiParent form and set the BackgroundImage() and BackgroundImageLayout() properties. The image will NOT display on the form at design-time, but it will be there when you run the application.