Hello all,
I want to know how I can avoid a form from being displayed if an instance of the same form is already being displayed or visible.
I will be thankful to all of you.
Regards,
Misbah H. Ansari

Hi Misbah

You need to check to see if the form is not nothing, meaning that it must be created if it is then use the bringtofront property, this will bring the form to the fore gound,if the form is nothing then create an instance of the form.

 'if the form is equal to nothing or isdisposed then create it
                If frmPart Is Nothing OrElse frmPart.IsDisposed Then
                    frmPart = New frmParts
                    frmPart.MdiParent = Me
                    frmPart.Show()
                Else
                    'if form already open bring it to the fron
                    frmPart.BringToFront()
                End If

the code is for a mdi app, to use in an sdi remove the mdiparent line

HTH Duncan

Duncan