proe大侠帮我看看程序阿

lih2005

这是一个命令按钮的调用函数，目的是实现所选零件沿x轴旋转20度，怎么不对阿，总是出现fail的消息，郁闷ing
/*================================================================*\
FUNCTION: viewrotate() 菜单按钮1的动作函数
\*================================================================*/
int viewrotate()
{
   &nbsproSelection *sel;
    int n_sel;
   &nbsproError err;
   &nbsproFileName MsgFile;
 &nbsproStringToWstring(MsgFile, "DisplayMessage3.txt");
    err = ProSelect ("part", 1, NULL, NULL, NULL, NULL, [$sel, &n_sel)]
        if (err != PRO_TK_NO_ERROR || n_sel < 1)
      ProMessageDisplay(MsgFile, "select again");
   &nbsproViewRotate(sel[0], NULL, PRO_X_ROTATION, 20);
   &nbsproWindowRepaint(PRO_VALUE_UNUSED);
 &nbsproMessageDisplay(MsgFile, "selected part rotate");
    return true;
}