帮我看下这段代码错哪

[gxx2019]

void Cthread11Dlg::OnBnClickedButton1()
{
hThread1 = CreateThread(NULL, 0, Func1, NULL, 0, NULL);
hThread2 = CreateThread(NULL, 0, Func2, NULL, 0, NULL);
CloseHandle(hThread1);
CloseHandle(hThread2);
}

DWORD WINAPI Cthread11Dlg::Func1(LPVOID lpparameter)
{
Cthread11Dlg* p = (Cthread11Dlg*)lpparameter;
WaitForSingleObject(hMutex, INFINITE);
Sleep(30);
p->Add1();
ReleaseMutex(hMutex);
return 0;
}

DWORD WINAPI Cthread11Dlg::Func2(LPVOID lpparameter)
{
Cthread11Dlg* p = (Cthread11Dlg*)lpparameter;
WaitForSingleObject(hMutex, INFINITE);
Sleep(30);
p->Add2();
ReleaseMutex(hMutex);
return 0;
}

void Cthread11Dlg::Add1()
{
m_list.AddString(_T("线程1运行"));
}

void Cthread11Dlg::Add2()
{
m_list.AddString(_T("线程2运行"));
}
当我点Button1按钮时，创建两线程，分别向ListBox写入线程1运行，线程2运行
为什么我点Button1时，会弹出应用程序错误，"0x787af9cc"指令中“0x00000098”内存，不能为read?

[清水火]

无语了，你传进去的咋就是个空值呢。
改成
hThread1 = CreateThread(NULL, 0, Func1, this, 0, NULL);
hThread2 = CreateThread(NULL, 0, Func2, this, 0, NULL);