新手，求各位大神帮帮忙。。。谢谢！！！

moooiiiii

   经典图书

我用的是C++，在刚连通的程序中加入了下面这段代码
DocumentVersionHistory(ISldWorks* m_pSldWorks)
{
BSTR* versionHistStrings = NULL;
LPMODELDOC2 pModelDoc = NULL;
HRESULT hres= S_OK;
hres = m_pSldWorks->get_IActiveDoc2(&pModelDoc);
if (hres != S_OK || pModelDoc == NULL)
return true;
int versHistCount = 0;
hres = pModelDoc->IGetVersionHistoryCount(&versHistCount);
if (hres != S_OK || versHistCount == 0)
{
pModelDoc->Release();
return true;
}
versionHistStrings = new BSTR[versHistCount];
hres = pModelDoc->IVersionHistory(versionHistStrings);
if (hres != S_OK || versionHistStrings == NULL)
{
delete [] versionHistStrings;
pModelDoc->Release();
return true;
}
// For each version found
for (int ii = 0;ii < versHistCount;ii++)
{
CString tempstr2(versionHistStrings[ii]);
AfxMessageBox (tempstr2);
SysFreeString( versionHistStrings[ii]);
}
// default destructor
pModelDoc->Release();
delete [] versionHistStrings;
}
然后就出现了如下问题：
E:My c++bianlizhuangpeitiswobj.cpp(351) : error C2065: 'LPMODELDOC2' : undeclared identifier
E:My c++bianlizhuangpeitiswobj.cpp(351) : error C2146: syntax error : missing ';' before identifier 'pModelDoc'
E:My c++bianlizhuangpeitiswobj.cpp(351) : error C2065: 'pModelDoc' : undeclared identifier
E:My c++bianlizhuangpeitiswobj.cpp(367) : error C2227: left of '->IGetVersionHistoryCount' must point to class/struct/union
E:My c++bianlizhuangpeitiswobj.cpp(373) : error C2227: left of '->Release' must point to class/struct/union
E:My c++bianlizhuangpeitiswobj.cpp(381) : error C2227: left of '->IVersionHistory' must point to class/struct/union
E:My c++bianlizhuangpeitiswobj.cpp(389) : error C2227: left of '->Release' must point to class/struct/union
E:My c++bianlizhuangpeitiswobj.cpp(417) : error C2227: left of '->Release' must point to class/struct/union
执行 cl.exe 时出错.
楼主新手，求各位大神帮帮忙，解决下，谢谢！！！

xmh850199

双击一下提示，会转到错误出处
E:My c++bianlizhuangpeitiswobj.cpp(351) : error C2065: 'LPMODELDOC2' : undeclared identifier
'LPMODELDOC2'未声明