qt vs2008 project link .net framework 3.5 lib can not support drap and drop .it also will crash when project use control qwebview.

i create a lib project HanZiToPinYin that use clr ,i create another project dragToWebView .
In file main.cpp of project dragToWebView i use HanZiToPinYin function :
1 #include "dragtowebview.h"
2 #include <QtWidgets/QApplication>
3 #include "HanZiToPinYin.h"
4 int main(int argc, char *argv[])
5

{ 6 CHanZiToPinYin::HanZiToPinYin(); 7 QApplication a(argc, argv); 8 dragToWebView w; 9 w.show(); 10 return a.exec(); 11 }

In file dragtowebview.cpp
21 #include "dragtowebview.h"
22 #include <QHBoxLayout>
23 #include "msgInputEdit.h"
24
25 dragToWebView::dragToWebView(QWidget *parent)
26 : QMainWindow(parent)
27

{ 28 ui.setupUi(this); 29 m_pMsgInputEdit= new CMsgInputEdit(ui.centralWidget); 30 QHBoxLayout*pLayOut = new QHBoxLayout ; 31 pLayOut->addWidget(m_pMsgInputEdit); 32 pLayOut->setContentsMargins(2,2,2,2); 33 ui.centralWidget->setLayout(pLayOut);/* */ 34 35 }

my issues is :
if i remove the code in line 6 and 29~33.then the dragToWebView project has no problem .and i can drag a file to mainwindow.bug if i use the code of line 6,then the mainwindow of dragToWebView project can not support drag and drop .
if i use the code of 29~33.the project crash,output message is :
guardPage.Protect & PAGE_GUARD
it crash in wtf of webket.
i build the qt source with attach stackbound_new.zip which in bug :
https://bugreports.qt-project.org/browse/qtBUG-38067
and
https://codereview.qt-project.org/#change,86137
but the problem also exist.