DelphiFAQ Home Search:

Allow only one instance of a program (works also under NT)

 

commentsThis article has not been rated yet. After reading, feel free to leave comments and rate it.

Just add this unit to your uses clause

uses Single;

and your program will not be started twice:

unit Single;

interface

implementation
  uses Windows, SysUtils;

var hnd: THandle;

initialization
  hnd := CreateMutex(nil, True, 'irgendwaseinmaliges');
  if GetLastError = ERROR_ALREADY_EXISTS then Halt;

finalization
  if hnd <> 0 then CloseHandle(hnd);
end.
You don't like the formatting? Check out SourceCoder then!

Comments:

 

 

NEW: Optional: Register   Login
Email address (not necessary):

Rate as
Hide my email when showing my comment.
Please notify me once a day about new comments on this topic.
Please provide a valid email address if you select this option, or post under a registered account.
 

Show city and country
Show country only
Hide my location
You can mark text as 'quoted' by putting [quote] .. [/quote] around it.
Please type in the code:

Please do not post inappropriate pictures. Inappropriate pictures include pictures of minors and nudity.
The owner of this web site reserves the right to delete such material.

photo Add a picture: