Execute From Pointer

[Pachydermitis]

Hi,
Is there any way to execute a function by using it's pointer?
The reason I want to do this is: I have a control on a form that I
have wrapped with a class. I want to be able to dynamically assign a
function that is in the form's code to an event defined in the wrapper
class. The application.run function won't recognise the name of the
function in a form (at least I don't know how to make it so). e.g.
Applicaion.Run "Form_fMyForm.M yFunction" So I thought that pointer to
the function might work - if I could figure out how to execute the
function using it's address.
Thanks in advance
Pachydermitis

[Tom van Stiphout]

Re: Execute From Pointer

On 6 Nov 2006 18:07:45 -0800, "Pachydermi tis" <praesagus@gmai l.com>
wrote:

Not by pointer (unless you would consider AddressOf, an advanced
topic), but by name: check out the Eval function.

-Tom.

>Hi,
>Is there any way to execute a function by using it's pointer?
>The reason I want to do this is: I have a control on a form that I
>have wrapped with a class. I want to be able to dynamically assign a
>function that is in the form's code to an event defined in the wrapper
>class. The application.run function won't recognise the name of the
>function in a form (at least I don't know how to make it so). e.g.
>Applicaion.R un "Form_fMyForm.M yFunction" So I thought that pointer to
>the function might work - if I could figure out how to execute the
>function using it's address.
>Thanks in advance
>Pachydermiti s

[MGFoster]

Re: Execute From Pointer

Pachydermitis wrote:

Hi,
Is there any way to execute a function by using it's pointer?
The reason I want to do this is: I have a control on a form that I
have wrapped with a class. I want to be able to dynamically assign a
function that is in the form's code to an event defined in the wrapper
class. The application.run function won't recognise the name of the
function in a form (at least I don't know how to make it so). e.g.
Applicaion.Run "Form_fMyForm.M yFunction" So I thought that pointer to
the function might work - if I could figure out how to execute the
function using it's address.
Thanks in advance
Pachydermitis
>

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The correct syntax is: Forms!FormName. FunctionName

Try the Eval() function:

strFunction = "Forms!myForm.F unctionName"
Eval(strFunctio n)

--
MGFoster:::mgf0 0 <atearthlink <decimal-pointnet
Oakland, CA (USA)
** Respond only to this newsgroup. I DO NOT respond to emails **

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[Pachydermitis]

Re: Execute From Pointer

I was counting on addressof for the function address, but once I have
the pointer to a function, how do I execute it?
Thanks
P


Tom van Stiphout wrote:

On 6 Nov 2006 18:07:45 -0800, "Pachydermi tis" <praesagus@gmai l.com>
wrote:
>
Not by pointer (unless you would consider AddressOf, an advanced
topic), but by name: check out the Eval function.
>
-Tom.
>
>

Hi,
Is there any way to execute a function by using it's pointer?
The reason I want to do this is: I have a control on a form that I
have wrapped with a class. I want to be able to dynamically assign a
function that is in the form's code to an event defined in the wrapper
class. The application.run function won't recognise the name of the
function in a form (at least I don't know how to make it so). e.g.
Applicaion.Run "Form_fMyForm.M yFunction" So I thought that pointer to
the function might work - if I could figure out how to execute the
function using it's address.
Thanks in advance
Pachydermitis

[Pachydermitis]

Re: Execute From Pointer

Thanks for the tip MG. I tried that but it did not work. It seems
that eval, run and CallByName can not recognize methods of classes
unless called within them.

MGFoster wrote:

Pachydermitis wrote:

Hi,
Is there any way to execute a function by using it's pointer?
The reason I want to do this is: I have a control on a form that I
have wrapped with a class. I want to be able to dynamically assign a
function that is in the form's code to an event defined in the wrapper
class. The application.run function won't recognise the name of the
function in a form (at least I don't know how to make it so). e.g.
Applicaion.Run "Form_fMyForm.M yFunction" So I thought that pointer to
the function might work - if I could figure out how to execute the
function using it's address.
Thanks in advance
Pachydermitis

>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
>
The correct syntax is: Forms!FormName. FunctionName
>
Try the Eval() function:
>
strFunction = "Forms!myForm.F unctionName"
Eval(strFunctio n)
>
--
MGFoster:::mgf0 0 <atearthlink <decimal-pointnet
Oakland, CA (USA)
** Respond only to this newsgroup. I DO NOT respond to emails **
>
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Version: PGP for Personal Privacy 5.0
Charset: noconv
>
iQA/AwUBRU/z4IechKqOuFEgEQ Io0ACg6Kt4eU1i5 DK98VGwBDZfq1vm gK0AoNJE
hbxWd9uahJiNexN biH/mwQfv
=yui4
-----END PGP SIGNATURE-----

[Lyle Fairfield]

Re: Execute From Pointer


Pachydermitis wrote:

Hi,
Is there any way to execute a function by using it's pointer?
The reason I want to do this is: I have a control on a form that I
have wrapped with a class. I want to be able to dynamically assign a
function that is in the form's code to an event defined in the wrapper
class. The application.run function won't recognise the name of the
function in a form (at least I don't know how to make it so). e.g.
Applicaion.Run "Form_fMyForm.M yFunction" So I thought that pointer to
the function might work - if I could figure out how to execute the
function using it's address.
Thanks in advance
Pachydermitis

Did you try

Form_fMyForm.My Function

?

This works for me for both a Sub and Function. One must remember to
close the form afterward. The Function or Sub must be Public.

I have been doing this since the last century. It works in standard
modules.

I have never needed eval although I remember someone posting a good use
for it, I just don't remember the use.

And yes, this works for a sub-form too. The notion of using the
Form!Control.Fo rm etc etc obsolete syntax is pointless.

I see you want to use it for a class event. Well, I'm not going to take
the time to test that. But it works flawlessly in event procedures of
another form, which are just classes with nice boobs anyway.

[Pachydermitis]

Re: Execute From Pointer

Hey Lyle,
What I actually need is to be able to execute a function that resides
in a class and whose name I need to be able to change during runtime.

dim sFunctionName as string
sFunctionName ="MyFunction "
application.run sFunctionName
works well, as does Eval

dim sFunctionName as string
sFunctionName ="mMyClass.MyMe thod"
application.run sFunctionName
Does not

I am having the same results with CallByName and Eval
Hence my question as to how I can execute a proceedure using it's
pointer.

Thanks again all for your help
P

Lyle Fairfield wrote:

Pachydermitis wrote:

Hi,
Is there any way to execute a function by using it's pointer?
The reason I want to do this is: I have a control on a form that I
have wrapped with a class. I want to be able to dynamically assign a
function that is in the form's code to an event defined in the wrapper
class. The application.run function won't recognise the name of the
function in a form (at least I don't know how to make it so). e.g.
Applicaion.Run "Form_fMyForm.M yFunction" So I thought that pointer to
the function might work - if I could figure out how to execute the
function using it's address.
Thanks in advance
Pachydermitis

>
Did you try
>
Form_fMyForm.My Function
>
?
>
This works for me for both a Sub and Function. One must remember to
close the form afterward. The Function or Sub must be Public.
>
I have been doing this since the last century. It works in standard
modules.
>
I have never needed eval although I remember someone posting a good use
for it, I just don't remember the use.
>
And yes, this works for a sub-form too. The notion of using the
Form!Control.Fo rm etc etc obsolete syntax is pointless.
>
I see you want to use it for a class event. Well, I'm not going to take
the time to test that. But it works flawlessly in event procedures of
another form, which are just classes with nice boobs anyway.

[Pachydermitis]

Re: Execute From Pointer

Ok, I'm a dork and did not read properly, here's how it works:

dim sFunctionName as string
dim cMyForm as Form_MyForm 'declared so we can explicitly destroy it
set cMyForm =new Form_MyForm
sFunctionName=" MyMethod"
CallByName Form_MyForm, sFunctionName, VbMethod
set cMyForm =nothing

CallByName was specifically designed to answer this need.
Thanks all
P

[hbinc]

Re: Execute From Pointer

Hi Pachydermitis,

What I do is the following:
In any event on the I can add these statements:
ThisProcname = ....
Run ThisProcname, ThisForm
ThisProcname is composed dynamically, and results in the name of a
Public Sub.
Depending on situation ThisProcname (and so it behaviour) can be quite
different.

The Sub ThisProcname takes one argument: ThisForm, i.e. the Form on
which the event was fired. So the Sub knows exactly all the Controls
and their values (instead of using parameters) on the form.
In case you need a function-value: ThisProcname can leave a value in a
certain (invisible) control on ThisForm.

Regards, HBinc.



Pachydermitis schreef:

Hi,
Is there any way to execute a function by using it's pointer?
The reason I want to do this is: I have a control on a form that I
have wrapped with a class. I want to be able to dynamically assign a
function that is in the form's code to an event defined in the wrapper
class. The application.run function won't recognise the name of the
function in a form (at least I don't know how to make it so). e.g.
Applicaion.Run "Form_fMyForm.M yFunction" So I thought that pointer to
the function might work - if I could figure out how to execute the
function using it's address.
Thanks in advance
Pachydermitis

[Pachydermitis]

Re: Execute From Pointer

oops should be
CallByName cMyForm, sFunctionName, VbMethod

Pachydermitis wrote:

Ok, I'm a dork and did not read properly, here's how it works:
>
dim sFunctionName as string
dim cMyForm as Form_MyForm 'declared so we can explicitly destroy it
set cMyForm =new Form_MyForm
sFunctionName=" MyMethod"
CallByName Form_MyForm, sFunctionName, VbMethod
set cMyForm =nothing
>
CallByName was specifically designed to answer this need.
Thanks all
P