Board index » cppbuilder » Opening New Form in MDIApp

2005-03-03 11:12:35 AM
cppbuilder19
When I do this I get a violation error.
if (ExtractFileExt(OpenDialog->FileName).LowerCase() == ".xms" )
{
MSXCBEForm = new TMSXCBEForm(this);
}
For some reason MSXCBForm = Null, What do I need to do to create this new
form.
Additionally, what I really want to once I've created the new form is to
open it with information from the OpenDialog as shown below. But again I am
not understanding what is going because it doesn't work.
if (ExtractFileExt(OpenDialog->FileName).LowerCase() == ".xms" )
{
MSXCBEForm = new TMSXCBEForm(this);
MSXCBEForm->OpenMSXFile(fIn, ansiFileName);
}
I would appreciate any guidance or suggestions on how to open a new form and
execute one of its functions with some parameters.
Thanks,
Kiwi
 

On Wed, 2 Mar 2005 22:12:35 -0500, Kiwi wrote:
Are you getting an access violation, or is MSXCBEForm (whatever that
is) not getting set?
Why are you having this as the owner (not saying you shouldn't just
asking what the rationale is)? Should it be NULL instead?
--
Good luck,
liz
 

if (ExtractFileExt(OpenDialog->FileName).LowerCase() == ".xms" )
{
MSXCBEForm = new TMSXCBEForm(this); // This is attempting to open
a new form; something that worked for another form.
}
The form gets opened and when I follow it with Debug and look at one of the
first lines in the form constructor e.g.
MSXCBEForm->Height = 650;
MSXCBEForm is equal to NULL and I get an access violation error associated
with vcl60.bpl when that instruction is executed.
Thanks,
Kiwi
 

{smallsort}

"Kiwi" < XXXX@XXXXX.COM >wrote in message
possible go wrong would have to inside of the TMSXCBEForm class itself. You
did not show any of that code.
Gambit
 

On Thu, 3 Mar 2005 00:52:51 -0500, Kiwi wrote:
The constructor should merely refer to the member of the object
--
Good luck,
liz
 

Liz Albin wrote:
Height = 650;
there.
Hans.
 

"Kiwi" < XXXX@XXXXX.COM >wrote in message
AFTER the constructor exits. You should not be using the MSXCBEForm
variable from inside of the TMSXCBEForm class's methods anyway. Use the
implicit 'this' pointer instead:
this->Height = 650;
Or simply:
Height = 650;
Gambit