"Qt 5.6.2 (x86_64-little_endian-llp64 shared (dynamic) debug build; by MSVC 2015)" 
 (created) hwnd= 0x468044e
QWinWidget() winId= 0x1750474
WM_ACTIVATEAPP wParam (active)= 1 lParam(thread)= 7088
WM_ACTIVATE wParam: high(minState)= 0 low(active)= 1 lParam(HWND)= 0x0
WM_SETFOCUS 0x0
WM_LBUTTONUP
QWinWidget(dialogW)= 0x13304ce
>QMessageBox::exec()
WM_KILLFOCUS 0x0
WM_ACTIVATE wParam: high(minState)= 0 low(active)= 0 lParam(HWND)= 0xe904c4
MyMessageBox::setVisible true internalWinId= 0xe904c4
>Full Dump
0x10010 1920x1080+0+0 [visible] "#32769" style=0x96000000 WS_POPUP WS_VISIBLE WS_CLIPSIBLINGS WS_CLIPCHILDREN classStyle=0x8 CS_DBLCLKS wndProc=0x7ffd2d9c4b20

  0xe904c4 434x103+529+342 [visible] title="Dialog 5.6.2"/"Qt5QWindowIcon"
  style=0x96cc0000 WS_POPUP WS_VISIBLE WS_CLIPSIBLINGS WS_CLIPCHILDREN
  WS_CAPTION WS_BORDER WS_DLGFRAME WS_SYSMENU WS_THICKFRAME exStyle=0x500
  WS_EX_WINDOWEDGE WS_EX_CONTEXTHELP classStyle=0x8 CS_DBLCLKS
  wndProc=0x7ffd0c94bd90
  module="d:\dev\projects\qtsolbug71_56\debug\qtsolbug71.exe"
  
  0x468044e 1440x759+26+26 [visible] title="Qt 5.6.2
  (x86_64-little_endian-llp64 shared (dynamic) debug build; by MSVC
  2015)"/"qtest" style=0x1ccf0000 WS_VISIBLE WS_DISABLED WS_CLIPSIBLINGS
  WS_CAPTION WS_BORDER WS_DLGFRAME WS_SYSMENU WS_THICKFRAME WS_GROUP
  WS_TABSTOP WS_MINIMIZEBOX WS_MAXIMIZEBOX exStyle=0x100 WS_EX_WINDOWEDGE
  classStyle=0x3 CS_HREDRAW CS_VREDRAW wndProc=0x7ff73b4c1177
  module="d:\dev\projects\qtsolbug71_56\debug\qtsolbug71.exe"
    
    0x13304ce 656x519+666+306 title="DialogWinWidget"/"Qt5QWindowIcon"
    style=0x46000000 WS_CHILD WS_CLIPSIBLINGS WS_CLIPCHILDREN classStyle=0x8
    CS_DBLCLKS wndProc=0x7ffd0c94bd90
    module="d:\dev\projects\qtsolbug71_56\debug\qtsolbug71.exe"
    
    0x1750474 418x35+34+57 [visible] title="MainWinWidget"/"Qt5QWindowIcon"
    style=0x56000000 WS_CHILD WS_VISIBLE WS_CLIPSIBLINGS WS_CLIPCHILDREN
    classStyle=0x8 CS_DBLCLKS wndProc=0x7ffd0c94bd90
    module="d:\dev\projects\qtsolbug71_56\debug\qtsolbug71.exe"