MDIForm & Child Form Problem

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Hello everybody
I'm having some trouble in coding with the mdi form and a child form.
loading mdi form

VB

SSTransition1.Visible = False
frmChngPass.Show
frmChngPass.Top = 0
frmChngPass.Left = 0

Unloading the form Change Password

VB

Unload Me
MDIForm1.Show
SSTransition1.Visible = True

and the error is (Run-time error 424 object required)

What i'm doing wrong?

Posted 1-Jun-14 9:00am

Ardi Durres

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Sergey Alexandrovich Kryukov 1-Jun-14 15:14pm

Never use MDI and be happy. Don't try to torture yourself and scare off your users with MDI.
—SA

[no name] 1-Jun-14 15:52pm

Well the first thing you are doing wrong is assuming that we would have any idea at all what SSTransition1 and MDIForm1 refer to and what object your error message is referring to.

Ardi Durres 2-Jun-14 7:32am

SSTransition1 is Sheridan or Infragistics components.
Because i can't attach command buttons to mdi form i use sstransition to attach the command buttons on mdi form.

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CHill60 · Answer 1 · 2014-06-04T08:36:00

Firstly I would avoid the use of Sheridan components - I'm not convinced they work under Windows 7.

Most people used PictureBoxes to contain buttons on MDI forms. Note I say "used" as this language is no longer supported and most developers are migrating programs to .NET (where they are able). Also MDI was/is a horrible user experience at the best of times.

Having said that, I presume the error is being produced by the line

SSTransition1.Visible = True

Based on your statement

Quote:
Unloading the form Change Password

and the lines

VB

Unload Me
MDIForm1.Show

immediately above it, I also presume that this offending line is in the child form "Change Password". But from your comment

Quote:
i use sstransition to attach the command buttons on mdi form

SSTransition1 is a control on the MDI Parent Form.

So either
A) Put SSTransition1.Visible = True in an appropriate event on the MDI form, or
B) Use MDIForm1.SSTransition1.Visible = True

Better yet, do not use an MDI child form and don't bother hiding the buttons. Just display the "Change Password" form as Modal. The user will not be able to click the underlying buttons until the modal form is closed.