AutoLISP 符号 
函数 和 让 ObjectARX 应用程序检查和更改 AutoLISP 变量的值。acedGetSym()acedPutSym() 在第一个示例中,用户输入以下 AutoLISP 表达式: 命令:(setq testboole t) T 命令:(setq teststr “HELLO, WORLD”) “你好,世界” 命令:(setq sset1 (ssget)) <选择集:1> 然后,以下示例代码演示如何检索符号的新值。acedGetSym() struct resbuf *rb; 
int rc; 
long sslen; 
rc = acedGetSym("testboole", &rb); 
if (rc == RTNORM && rb->restype == RTT) 
    acutPrintf("TESTBOOLE is TRUE\n"); 
acutRelRb(rb); 
rc = acedGetSym("teststr", &rb); 
if (rc == RTNORM && rb->restype == RTSTR) 
    acutPrintf("TESTSTR is %s\n", rb->resval.rstring); 
acutRelRb(rb); 
rc = acedGetSym("sset1", &rb); 
if (rc == RTNORM && rb->restype == RTPICKS) { 
    rc = acedSSLength(rb->resval.rlname, &sslen); 
    acutPrintf("SSET1 contains %lu entities\n", sslen); 
}
acutRelRb(rb); 
反之,可以创建或更改 AutoLISP 符号的绑定,如下所示:acedPutSym() ads_point pt1; 
pt1[X] = pt1[Y] = 1.4; pt1[Z] = 10.9923; 
rb = acutBuildList(RTSTR, "GREETINGS", 0); 
rc = acedPutSym("teststr", rb); 
acedPrompt("TESTSTR has been reset\n"); 
acutRelRb(rb); 
rb = acutBuildList(RTLB, RTSHORT, -1, 
    RTSTR, "The combinations of the world", 
    RTSTR, "are unstable by nature.", RTSHORT, 100, 
    RT3DPOINT, pt1, 
    RTLB, RTSTR, "He jests at scars", 
    RTSTR, "that never felt a wound.", RTLE, RTLE, 0); 
rc = acedPutSym("longlist", rb); 
acedPrompt("LONGLIST has been created\n"); 
acutRelRb(rb);
要将 AutoLISP 变量设置为 nil,请进行以下赋值和函数调用: rb->restype = RTNIL;
acedPutSym("var1", rb);
用户可以检索这些新值。(如示例中所示,程序应通知用户任何更改。 TESTSTR 已重置。 LONGLIST 已创建。 命令:!teststr (“问候”) 命令:!longlist ((-1 “世界的组合”“本质上是不稳定的。100 (1.4, 1.4, 10.9923) (“他拿伤疤开玩笑”,“从来没有感觉到伤口。 父主题: | 
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