用gdal绘制dxf的时候，无法输出text

Question

OGRPoint POINT;

POINT.setX(10);
POINT.setY(10);

OGRStyleTable oStyleTable;

OGRStyleMgr  *poStyleMgr = new OGRStyleMgr(&oStyleTable);

poStyleMgr->SetFeatureStyleString(poFeature,"nihao",TRUE);

//OGRStyleLabel text;

//text.SetTextString("text.dxf");

poFeature->SetStyleString("LABEL");

//poFeature->SetGeometry( &Ring);
poFeature->SetGeometry( &POINT);

if( dxfLayer->CreateFeature( poFeature ) != OGRERR_NONE )  
{  
    printf( "Failed to create feature in dxf.\n" );  
    exit( 1 );  
}

想绘制text，但是现在显示不出来，不知道怎么把点和label关联起来