How do I add QGIS Dissolve function to my C++ Windows ATL program?

Question

This is my current code segment:

QString myPluginsDir = 
"c:/osgeo4w/apps/lib/qgis";
QString myLayerPath = 
"c:/users/tygh/gisdata/farms/";
QString myLayerBaseName = 
"potash";
QString myProviderName = 
"ogr";

// Instantiate Provider Registry
QgsProviderRegistry::instance(myPluginsDir);
QgsVectorLayer * mypLayer = 
new QgsVectorLayer(myLayerPath, myLayerBaseName, myProviderName);
QgsSingleSymbolRenderer *mypRenderer = 
new QgsSingleSymbolRenderer(mypLayer->geometryType());
QList <QgsMapCanvasLayer> myLayerSet;
mypLayer->setRenderer(mypRenderer);

// Add the Vector Layer to the Layer Registry
QgsMapLayerRegistry::instance()->addMapLayer(mypLayer, TRUE);

// Add the Layer to the Layer Set
myLayerSet.append(QgsMapCanvasLayer(mypLayer, TRUE));

// Run QGIS disolve
QgsGeometryAnalyzer Qga;
Qga.dissolve(mypLayer, (LPTSTR)bstrFilename);