Solved

getting text from another program

Posted on 2002-03-16
4
1,638 Views
Last Modified: 2010-08-05
hi,

on thw winamp site it says you can get the current song playing

e.g this c++ code:

char this_title[2048],*p;
GetWindowText(hwndWinamp,this_title,sizeof(this_title));
p = this_title+strlen(this_title)-8;
while (p >= this_title)
{

if (!strnicmp(p,"- Winamp",8)) break;
p--;

}
if (p >= this_title) p--;
while (p >= this_title && *p == ' ') p--;
*++p=0;

i'm trying to convert that code to delphi and this is what i got so far:

const CustRec: pchar = '';

procedure TForm1.Button1Click(Sender: TObject);
var
ino: pchar;
begin
hwndwinamp := FindWindow('Winamp v1.x', nil);
getwindowtext(hwndwinamp,custrec,sizeof(custrec));
ino := custrec;
showmessage(ino);
end;

anyone know where i'm going wrong?

cheers
classic_gaming
0
Comment
Question by:classic_gaming
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 17

Expert Comment

by:inthe
ID: 6872597
hi,
use wm_getText message heres an example , it works ok:

Function ReadWinAmpSongName:string;
var h:hwnd;
Text:string;
NumChars:integer;
begin
h:=FindWindow('Winamp v1.x',nil);
if h<>0 then begin
NumChars:=SendMessage(h,wm_getTextLength,0,0);
setlength(text,NumChars);
SendMessage(h,wm_getText,NumChars+1,Integer(text));
result:=text;
end
else result:='no winamp found';
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
edit1.text := ReadWinAmpSongName;
end;
0
 
LVL 17

Accepted Solution

by:
inthe earned 100 total points
ID: 6872629
heres the GetWindowText example,you need to use an array of char instead of pchar

function ReadWinampSongName2:String;
var
wind:HWND;
Windtext:array[0..255]of Char;
begin
Wind:=FindWindow('Winamp v1.x',nil);
GetWindowText(Wind,WindText,255);
result := WindText;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
edit1.text :=  ReadWinampSongName2;
end;
0
 
LVL 34

Expert Comment

by:Slick812
ID: 6873468
it looks like the WinAmp uses a 2k buffer (Pchar) for the Title of the window

char this_title[2048]

so the Array of Char should be
Ttext:array[0..2048]of Char;
or use a String var for the Text variable
   var
   TitleText: String;

SetLength(TitleText, 2048);
GetWindowText(hWnd, @TitleText[1],2048);

it also appears to remove the "- Winamp" from the title
if (!strnicmp(p,"- Winamp",8)) break;
you might use Ps := Pos('- Winamp',Titleext) to find it and
Delete(TitleText, Ps, 8); to remove it

and it looks like it removes the extra spaces, you might use
TitleText := Trim(TitleText);
0
 

Author Comment

by:classic_gaming
ID: 6873713
you posted exactly what i want :)

points go to you

cheers
classic_gaming
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…
Suggested Courses
Course of the Month4 days, 13 hours left to enroll

635 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