DELPHI 使程序只能运行一次
procedure TForm1.FormCreate(Sender: TObject);
var
errno:integer;
hmutex:hwnd;
begin
hmutex:=createmutex(nil,false,pchar(application.Title));
errno:=getlasterror;
if errno=error_already_exists then
begin
ShowMessage('程序已经在运行了');
Application.Terminate;
end;
end;
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