Title: Create Threads without using TThreadClass
Question: How to create threads without using the TThread Class in Delphi?
Answer:
You can create threads withoutusingthe TThread Class bymaking use of the WinAPI functions CreateThread, SuspendThread, Resume Thread and Terminate Thread functions
Create 2 edit controls and 6 buttons
The code is given below
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
procedure incedit1;stdcall;
procedure incedit2;stdcall;
type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Edit2: TEdit;
Button6: TButton;
Button7: TButton;
Button2: TButton;
Button3: TButton;
Button5: TButton;
Button4: TButton;
procedure Button1Click(Sender: TObject);
procedure Button6Click(Sender: TObject);
procedure Button7Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button5Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
var
th1,th2:cardinal;
h1,h2:integer;
procedure incedit1;
var
i:integer;
begin
i:=0;
while true do
begin
form1.edit1.text:=inttostr(i);
i:=i+1;
end;
end;
procedure incedit2;
var
i:integer;
begin
i:=0;
while true do
begin
form1.edit2.text:=inttostr(i);
i:=i+1;
end;
end;
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
begin
h1:=beginthread(nil,1024,@incedit1,nil,0,th1);
h2:=beginthread(nil,1024,@incedit2,nil,0,th2);
end;
procedure TForm1.Button6Click(Sender: TObject);
begin
terminatethread(h1,0);
end;
procedure TForm1.Button7Click(Sender: TObject);
begin
terminatethread(h2,0);
end;
procedure TForm1.Button4Click(Sender: TObject);
begin
resumethread(h1);
end;
procedure TForm1.Button5Click(Sender: TObject);
begin
resumethread(h2);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
suspendthread(h1);
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
suspendthread(h2);
end;