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Code:

Function ExecuteFile(FileName, Params, WorkingDir:string; Wait:boolean):integer;

{©Drkb v.3®Vit (Vitaly Nevzorov) -}

var

buffer: array[0..511] of Char;

TmpStr: String;

i: Integer;

StartupInfo:TStartupInfo;

ProcessInfo:TProcessInformation;

ext, key, fname, path:string;

exitcode:cardinal;

begin

if WorkingDir<>'' then ChDir(WorkingDir);

ext:=lowercase(ExtractFileExt(FileName));

path:=ExtractFilePath(FileName);

if ext<>'.exe' then

   With TRegistry.create do

     try

       RootKey:=HKEY_CLASSES_ROOT;

       OpenKey(ext, false);

       Key:=ReadString('');

       CloseKey;

       OpenKey(key+'\Shell\open\command', false);

       key:=ReadString('');

       fname:=ExtractFileName(key);

       if pos('/', fname)>0 then fname:=copy(fname,1, pos('/',fname)-1);

       FName:=StringReplace(FName, '%1', '', [rfReplaceAll, rfIgnoreCase]);

       if pos(' ',FileName)>0 then FileName:='"'+Filename+'"';

       TmpStr:=ExtractFilePath(key)+Fname+' '+FileName;

       if Params<>'' then TmpStr := TmpStr + ' ' + Params;

       Closekey;

     finally

       free;

     end

else

   begin

     TmpStr := FileName;

     TmpStr := TmpStr + ' ' + Params;

   end;

StrPCopy(buffer,TmpStr);

FillChar(StartupInfo,Sizeof(StartupInfo),#0);

StartupInfo.cb := Sizeof(StartupInfo);

StartupInfo.dwFlags := STARTF_USESHOWWINDOW;

StartupInfo.wShowWindow := SW_SHOWNORMAL;

if CreateProcess(nil, buffer, nil, nil, false, CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, nil, nil, StartupInfo, ProcessInfo) then

   begin

     if Wait then

       begin

         while WaitforSingleObject(ProcessInfo.hProcess,200)=WAIT_TIMEOUT         do application.ProcessMessages;

         GetExitCodeProcess(ProcessInfo.hProcess, exitcode);

       end;

   end

else

   Result := GetLastError();

end;