I found method for show SymbologyControl.
ISymbologyControlPtr pSym;
pSym.CreateInstance(CLSID_SymbologyControl);
IID pSymIID =pSym.GetIID();
QAxWidget* symControlWidget = new QAxWidget();
symControlWidget->setControl("{2ACEE55E-C5F5-483C-8B10-D2B25B81F46F}"); //GUID
symControlWidget->queryInterface(QUuid(pSymIID), (void**)&pSym);
pSym->put_ShowContextMenu(VARIANT_TRUE);
QString styleFileName="C:\\Projects\\VSQTGUI\\Data\\ESRI_Optimized.ServerStyle";
BSTR bstr_sfn=CComBSTR((const char*)styleFileName.toAscii());
pSym->LoadStyleFile(bstr_sfn);
layout->addWidget(symControlWidget);
this->setLayout(layout);
But this control empy.While styles file not shown?How to show styles files items?PS:developed by Engine10 + VS2010 + QT4