关于ug drafting 的函数

有没有函数是把 UG 从 Modeling enviroment 转去 Drafting enviroment,
反之亦然.

Here is a sample code for using UF_ask_application_module().
but it just tell what module you are using, not switching between module.
int  module;
    UF_CALL(UF_ask_application_module([$module))]
    switch (module)
    {
        case UF_APP_DRAFTING:     
            uc1601("module = DRAFTING\n");    break;
        case UF_APP_MECHANISMS:     
            uc1601("module = MECHANISMS\n");    break;
        case UF_APP_CAM:     
            uc1601("module = CAM\n");    break;
        case UF_APP_ICAD:     
            uc1601("module = ICAD\n");    break;
        case UF_APP_MODELING:     
            uc1601("module = MODELING\n");    break;
        }