Solved

Function

Posted on 2000-04-03
6
151 Views
Last Modified: 2010-04-04
I am writeing a function that returns a boolean(true,false) and It doesnt seem to let me call a function from within the function, how can I do this?
0
Comment
Question by:nafa2221
  • 5
6 Comments
 
LVL 17

Expert Comment

by:inthe
Comment Utility
i havent tested this but it should work declare the functions globally so instead of calling
somefunction();
you can call
tform1.somefunction();

example:

  private
    function1(s : string);
    function2(t : tdatetime);  
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

function TForm1.function1(s : string);string;
begin
showmessage(s);
end;

function TForm1.function2(t:string);string;
begin
showmessage(t);
tform1.function2('here is function1 called in function2');
end;

if it dont work pates your 2 functions here  so we can look at.
0
 

Author Comment

by:nafa2221
Comment Utility
MatchedWindow:=TForm1.FindWindowThatContainSubString(AOWindows,'Welcome'); <-- Thay gives me the error undeclared indentifier...help!
0
 
LVL 17

Expert Comment

by:inthe
Comment Utility
erm please ignore above code it is gibberish(real bad)

here is a tested example of what i mean:
   
   
unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    function function1(s : string):string;
    function function2(t : string):string;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

function TForm1.function1(s : string):string;
begin
showmessage(s);
end;

function TForm1.function2(t : string):string;
begin
showmessage(t);
function1('here is function1 in function2');
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
Function2('function2');
end;

end.

0
IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

 
LVL 17

Expert Comment

by:inthe
Comment Utility
oh i didnt see your posting.

what is this?

MatchedWindow:=TForm1.FindWindowThatContainSubString(AOWindows,'Welcome'); <-- Thay gives me the error undeclared indentifier...help!

that tells me nothing..
have you made this function yourself?
is it delared globally?
if so i would need see your full function to understand the error.
and show you where to put the code in your unit.
i presume your calling it on a button click or something ..?
please take a look at the second posting of mine and i think you will see what to do.


0
 
LVL 17

Accepted Solution

by:
inthe earned 50 total points
Comment Utility
well i guess it is procedure your using not function but it is same principal..
 
this will work if you declare globally :
your procedure and a boolean var.

private
    { Private declarations }
procedure FindWindowThatContainSubString
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  MatchedWindow : Boolean;

implementation

procedure FindWindowThatContainSubString(blah,blah);
begin
blah blah
end;

procedure Tform1.Button1Click(sender : tobject);
begin
MatchedWindow:=FindWindowThatContainSubString(AOWindows,'Welcome');  
end;



0
 
LVL 17

Expert Comment

by:inthe
Comment Utility
hi nafa,
having read some of your questions do you think this may help you:
i also use aol sometiomes so i could check the classnames to get this function.
mm.. i see your after the
"welcome , Barry" Window ..
what do you intend to do with this window when you have it?
maybe i can help more ..


unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

Procedure FindAolWindow;
var
AolMainWnd,AolMdi,AolWelcomeWnd : hwnd;
s : array [0..255]of char;
begin
  AolMainWnd:= FindWindow('AOL Frame25',nil);
  if AolMainWnd <> 0 then begin
  AolMdi := FindWindowEx(AolMainWnd,0,'MDIClient',nil);
  if AolMdi <> 0 then begin
  AolWelcomeWnd  := FindWindowEx(AolMdi,0,'AOL Child',nil);
  if AolWelcomeWnd <>0 then
  begin
  getwindowtext(AolWelcomeWnd,s,255);
  if pos('Welcome',s) <> 0 then
    begin
  showmessage('Connected ')
    end
  else
   if pos('Goodbye',s) <> 0 then
     begin
  showmessage('Not Connected' );
    end
   else showmessage('Error..Aol running but Welcome/Goodbye Window not found');
   end;
 end;
 end
 else showmessage('Aol not running');
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
 FindAolWindow;
end;

end.
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Suggested Solutions

Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
When you create an app prototype with Adobe XD, you can insert system screens -- sharing or Control Center, for example -- with just a few clicks. This video shows you how. You can take the full course on Experts Exchange at http://bit.ly/XDcourse.
This video explains how to create simple products associated to Magento configurable product and offers fast way of their generation with Store Manager for Magento tool.

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now