My project uses a MDI parent form and several child forms. I need to call a
public sub in the parent form (which is also the startup object) from one of
the child forms in order to change the appearance of the toolbar under
certain conditions. So far I have not figured out how to reference the sub
from another form. I figure I need the object name of the startup form, but
since I don't declare this in code as I do the other forms, I haven't been
able to find what this is. Using the class name ("frmMain") doesn't work.
Thanks for any advice.
Steve Enzer
6  1732 
when instantiating child in main
frmChild.owner = me
when needing to call sub from child
ctype(me.owner, frmMain).subToE xecute
"Steve Enzer" <en***@frontier net.net> wrote in message
news:eK******** ******@TK2MSFTN GP14.phx.gbl... My project uses a MDI parent form and several child forms. I need to call
a public sub in the parent form (which is also the startup object) from one
of the child forms in order to change the appearance of the toolbar under
certain conditions. So far I have not figured out how to reference the
sub from another form. I figure I need the object name of the startup form,
but since I don't declare this in code as I do the other forms, I haven't been
able to find what this is. Using the class name ("frmMain") doesn't work.
Thanks for any advice.
Steve Enzer
Thanks for your advice, but I'm getting an error with the code you
suggested.
I'm using the statement:
CType(Me.Owner, frmMain).TestBo x()
to call the public subroutine TestBox in frmMain. When I test the code I
get an exception with the message:
"An unhandled exception of type 'System.NullRef erenceException ' occurred in
Project Manager.exe
Additional information: Object reference not set to an instance of an
object."
What do I try next? I'm a VB6 programmer trying to start a new project in
VB .NET 2003 and I'm still on the steep part of the learning curve.
Steve,
Use mdiParent instead of Owner in Champs advice or even very slightly
better.
DirectCast(me.M diParent,frmMai n).mysub
I hope this helps,
Cor
Your 'Owner' property is not set to a value. To use this techique, you'd
need to set the Owner property after creating the child form. Can you post
the code that does that?
(btw: Cor's technique is better, IMHO)
--
--- Nick Malik [Microsoft]
MCSD, CFPS, Certified Scrummaster http://blogs.msdn.com/nickmalik
Disclaimer: Opinions expressed in this forum are my own, and not
representative of my employer.
I do not answer questions on behalf of my employer. I'm just a
programmer helping programmers.
--
"Steve Enzer" <en***@frontier net.net> wrote in message
news:OZ******** *******@TK2MSFT NGP09.phx.gbl.. . Thanks for your advice, but I'm getting an error with the code you
suggested.
I'm using the statement:
CType(Me.Owner, frmMain).TestBo x()
to call the public subroutine TestBox in frmMain. When I test the code I
get an exception with the message:
"An unhandled exception of type 'System.NullRef erenceException ' occurred
in Project Manager.exe
Additional information: Object reference not set to an instance of an
object."
What do I try next? I'm a VB6 programmer trying to start a new project in
VB .NET 2003 and I'm still on the steep part of the learning curve.
Is performance better with DirectCast? Is this specific to this example or a
general rule? Preciate the response...
"Nick Malik [Microsoft]" <ni*******@hotm ail.nospam.com> wrote in message
news:yp******** ************@co mcast.com... Your 'Owner' property is not set to a value. To use this techique, you'd
need to set the Owner property after creating the child form. Can you
post the code that does that?
(btw: Cor's technique is better, IMHO)
--
--- Nick Malik [Microsoft]
MCSD, CFPS, Certified Scrummaster
http://blogs.msdn.com/nickmalik
Disclaimer: Opinions expressed in this forum are my own, and not
representative of my employer.
I do not answer questions on behalf of my employer. I'm just a
programmer helping programmers.
--
"Steve Enzer" <en***@frontier net.net> wrote in message
news:OZ******** *******@TK2MSFT NGP09.phx.gbl.. . Thanks for your advice, but I'm getting an error with the code you
suggested.
I'm using the statement:
CType(Me.Owner, frmMain).TestBo x()
to call the public subroutine TestBox in frmMain. When I test the code
I get an exception with the message:
"An unhandled exception of type 'System.NullRef erenceException ' occurred
in Project Manager.exe
Additional information: Object reference not set to an instance of an
object."
What do I try next? I'm a VB6 programmer trying to start a new project
in VB .NET 2003 and I'm still on the steep part of the learning curve.
Clamps,
General rule, although the optimizing seems to do a lot with the Ctype
(Convert Type).
Directcast is using as
CType is converting to or using as
Cor
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