[ARX]在下面的程序的pDisp = IDoc.GetModelSpace()处，为什么编译通不过哦！

Pangge_118

#include "acad.h"
// This is command 'COMCIRCLE'
void testgroupcomcircle()
{
// TODO: Implement the command
try
{
//声明变量
IAcadApplication IApp;
IAcadDocuments IDoc;
IAcadModelSpace IMSpace; IDispatch *pDisp = acedGetAcadWinApp()->GetIDispatch(TRUE);
IApp.AttachDispatch(pDisp);
//取得活动的AutoCAD文档
pDisp = IApp.GetActiveDocument();
IDoc.AttachDispatch (pDisp);
//取得文档中的模型空间对象
pDisp = IDoc.GetModelSpace(); //此处编译不能通过 IMSpace.AttachDispatch (pDisp);
SAFEARRAYBOUND rgsaBound;
rgsaBound.lLbound = 0L; //表示数组从0开始计数
rgsaBound.cElements = 3; //共3个数组元素 long i;
SAFEARRAY* pStartPoint = NULL;
//建立一个SAFEARRAY,VT_R8表示double类型
pStartPoint = SafeArrayCreate(VT_R8,1,&rgsaBound);
//给数组的各元素赋值
i = 0;
double value = 4.0;
SafeArrayPutElement(pStartPoint,&i,&value);
i = 1;
value = 2.0;
SafeArrayPutElement(pStartPoint,&i,&value);
i = 2;
value = 0.0;
SafeArrayPutElement(pStartPoint,&i,&value);
//将pStartPoint存放到VARIANT pt1中
VARIANT pt1;
VariantInit(&pt1);
V_VT(&pt1) = VT_ARRAY|VT_R8;
V_ARRAY(&pt1) = pStartPoint;
IMSpace.AddCircle (pt1,2.0);
}
catch(COleDispatchException e)
{
e.ReportError();
e.Delete();
} }