Modifing an external TEditBox

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3 total messages Started by Dan Mayo Mon, 12 Feb 2007 23:18

#2553

Author: Dan Mayo
Date: Mon, 12 Feb 2007 23:18

30 lines
2030 bytes

I have a running application that I would like to read or modify from 
another.  To start out with, I just wanted to make a simple test app. 
The first app is a simple vcl app with only an edit box on it, the other 
app would control the first, if it was running.

With the following I can get a handle that matches the edit box on the 
running executable:

   HANDLE SubForm = NULL;
   HANDLE EditBox = NULL;
   String TheClassName = ClassNameEditBox->Text;
   String TheWindowName = WindowNameEditBox->Text;
   SubForm = FindWindow(TheClassName.c_str(), TheWindowName.c_str());
   EditBox = GetWindow(SubForm, GW_CHILD); //the editbox is the only 
child on the test standalone app.


Now, when I try to set or get the text in the editbox, nothing happens. 
  How can I do that?

SetWindowText(EditBox,TestMessage->Text.c_str());  //TestMessage is a 
TEdit on my main form

I've also tried  SetDlgItemText(EditBox, i, TestMessage->Text.c_str()); 
looping thru i=0 to 100000.

I've also tried the corresponding Get...Text, with no luck.

Alas, a new frontier that ought to be so easy and basic.  What am I 
doing wrong?

Re: Modifing an external TEditBox

#2556

Author: Remy Lebeau (TeamB)
Date: Tue, 13 Feb 2007 00:23

20 lines
1507 bytes

"Dan Mayo" <do_not_spam_dmayo2@netzero.com> wrote in message
news:45d0f5fb@newsgroups.borland.com...

> Now, when I try to set or get the text in the editbox, nothing
happens.

If you read the documentation for Get/SetWindowText(), you will see
that they do not work across process boundaries.  You have to send the
WM_GET/SETTEXT messages directly instead.

> I've also tried  SetDlgItemText(EditBox, i,
TestMessage->Text.c_str());
> looping thru i=0 to 100000.

VCL components do not use any dialog IDs at all, so you cannot use the
Get/SetDlgItem...() functions with them.


Gambit

Re: Modifing an external TEditBox

#2557

Author: Dan Mayo
Date: Tue, 13 Feb 2007 01:32

23 lines
1662 bytes

Remy Lebeau (TeamB) wrote:
> "Dan Mayo" <do_not_spam_dmayo2@netzero.com> wrote in message
> news:45d0f5fb@newsgroups.borland.com...
> 
>> Now, when I try to set or get the text in the editbox, nothing
> happens.
> 
> If you read the documentation for Get/SetWindowText(), you will see
> that they do not work across process boundaries.  You have to send the
> WM_GET/SETTEXT messages directly instead.
> 
>> I've also tried  SetDlgItemText(EditBox, i,
> TestMessage->Text.c_str());
>> looping thru i=0 to 100000.
> 
> VCL components do not use any dialog IDs at all, so you cannot use the
> Get/SetDlgItem...() functions with them.
> 
> 
> Gambit
> 
> 
thanks.

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