Windows has triggered a breakpoint in my Thread - c++

Question

In my application I'm loading (for example) Device_Manager.dll and this Device_Manager depend on the selected model start to load the correct Devices.dll.
In my Device_Manager.dll, I created a window to use its handle later on my Devices because Devices uses this handle when they want to send messages to the application.
So, I made the new thread in my Device_Manager.dll to get these message when ever they arrive!
(I'm also using QT for create/load .dlls.)
After I created a thread, I received this error:
Windows has triggered a breakpoint in sepanta.agent.exe.
This may be due to a corruption of the heap, which indicates a bug in sepanta.agent.exe or any of the DLLs it has loaded.
This may also be due to the user pressing F12 while sepanta.agent.exe has focus.
The output window may have more diagnostic information.
I use these two methods to initialize and start my device manager:
(These methods are called in the main application after I successfully load the .dll.)
bool DeviceManagerPlugin::initializeDeviceManager()
{
EventManager pEventManager = new EventManager();
bool init_result = pEventManager->initilize_window();
...
if(initilize_status == S_OK)
{
return true;
}
else
{
return false;
}
}
void DeviceManagerPlugin::startDeviceManager()
{
handle_of_thread = 0;
int data_of_thread = 1;
handle_of_thread = CreateThread(NULL, 0,listenToIncomingWFSMessages2, &data_of_thread, 0, NULL);
my_thread_handle = handle_of_thread;
}
This is my EventManager class, which created windows:
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
...
default:
return DefWindowProc(hWnd, msg, wParam, lParam );
}
}
bool EventManager::initialize_window()
{
WNDCLASS Wclass;
HWND gHwnd = NULL;
HINSTANCE gHinstance = NULL;
ZeroMemory(&Wclass, sizeof(WNDCLASS));
Wclass.hInstance = gHinstance;
Wclass.cbClsExtra = 0;
Wclass.cbWndExtra = 0;
Wclass.lpszClassName = TEXT("Device_Manager_Class_Name");
Wclass.lpszMenuName = NULL;
Wclass.lpfnWndProc = WndProc;
Wclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
Wclass.hCursor = LoadIcon(NULL, IDC_ARROW);
Wclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
Wclass.style = CS_OWNDC;
if(!RegisterClass(&Wclass))
{
cout<<"Unable to Register Class";
return false;
}
ULONG Window_Width;
ULONG Window_Height;
DWORD style;
bool full_screen = false;
if(full_screen)
{
Window_Width = GetSystemMetrics(SM_CXSCREEN);
Window_Height = GetSystemMetrics(SM_CYSCREEN);
style = WS_POPUP;
}
else
{
Window_Width = SCREEN_WIDTH;
Window_Height = SCREEN_HEIGHT;
style = WS_OVERLAPPED|WS_SYSMENU;
}
gHwnd = CreateWindow(TEXT("Device_Manager_Class_Name")
, TEXT("Device_Manager_Class_Title")
, style
, 0
, 0
, Window_Width
, Window_Height
, GetDesktopWindow()
, NULL
, gHinstance
, NULL);
if(!gHwnd)
{
cout<<"Unable to create the main window";
return false;
}
//ShowWindow(gHwnd, SW_SHOW);
//UpdateWindow(gHwnd);
//SetFocus(gHwnd);
return true;
}
DWORD WINAPI listenToIncomingWFSMessages2(LPVOID lpParam)
{
MSG msg;
SecureZeroMemory(&msg, sizeof(MSG));
BOOL bRet;
HWND windows_handle;
SecureZeroMemory(&windows_handle, sizeof(HWND));
windows_handle = FindWindow(TEXT("Device_Manager_Class_Name"), 0);
while( (bRet = GetMessage( &msg, windows_handle, 0, 0 )) != 0)
{
if (bRet == -1)
{
// handle the error and possibly exit
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return 0;
}
What am I doing wrong here? What did I miss? If you have a better solution for what I'm about to do, please feel free to share it with me.