Visual PHP для Windows

$fso = new COM("Scripting.FileSystemObject");
$disks = array();
foreach($fso->Drives as $disk) $disks[] = $disk->DriveLetter; // получаем массив дисков

$diskarr = array("D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
$diskar = array();
foreach($diskarr as $fffile) if($fffile == $os_vdisk){$diskar[] = $fffile;}else {if(!in_array($fffile,$disks)) $diskar[] = $fffile;} // если диск существует, то исключаем его из списка
c("combobox2")->text = implode("\n",$diskar);
$icounter = 0;
foreach($diskar as $fffile) {if($fffile == $os_vdisk) c("combobox2")->itemIndex = $icounter; $icounter++;}

//$os_vdisk не понятно, что за переменная, но примерно код может выглядить так
$fso   = new COM("Scripting.FileSystemObject");
$disks = range('D', 'Z');

foreach($fso->Drives as $disk) {
  unset(array_search($disk->DriveLetter, $disks));
}

c("combobox2")->text      = implode("\n",$disks);
c("combobox2")->itemIndex = sizeof($disks);