Title: one instance application - professional way
Question: how can I have only one instance of my application running ?
Answer:
add this code to your application unit:
..
var
mutex : THandle;
mutexName : array [0..7] of char;
begin
try
StrPCopy(mutexName ,'anyname');
mutex := openmutex ( MUTEX_ALL_ACCESS, False, mutexName ) ;
If mutex = 0 then begin
mutex := createmutex ( nil , true, mutexName);
Application.Initialize;
Application.CreateForm ( TForm1, Form1 );
Application.Run;
ReleaseMutex (mutex);
end
else begin
Messagedlg( 'The application is already running.' , mtinformation, [mbOk],0 );
Application.Terminate;
end;
finally
...
end;
end.
Please see the windows SDK help for more information about "mutex"