function win32_fork($app, $params = '', $startDir = '')
{
$win32_idl = "\n\t\t[lib='shell32.dll'] int ShellExecuteA(int handle, char *operation, char *file, char *param, char *directory, int show);\n\t\t";
$ffi = new ffi($win32_idl);
$show = 7;
//0: hided, 1: normal, 2: mini, 3:maxi, 4:inactive, 7:mini inactive
$result = $ffi->ShellExecuteA(0, "open", tfb_shellencode($app), $params, tfb_shellencode($startDir), $show);
return $result;
}