求救啊！！！！！！！！！！MFC线程消息

[丢蛋鸡No1]

我想要通过ui线程发送消息给 view
huituView.h中
#define WM_MY_MESSAGE WM_USER+107
。。。。
afx_msg LRESULT OnMyMsg(WPARAM, LPARAM);
DECLARE_MESSAGE_MAP()

huituView.cpp中
BEGIN_MESSAGE_MAP(ChuituView, CView)
ON_MESSAGE(WM_MY_MESSAGE, OnMyMsg)
END_MESSAGE_MAP()

LRESULT ChuituView::OnMyMsg(WPARAM wParam, LPARAM lParam)
{
Invalidate();
return 0;
}

然后我在ui线程中定义函数
void CUiThread::OnDraw(WPARAM wParam,LPARAM lParam)
{
::PostMessage((HWND)(GetMainWnd()->GetSafeHwnd()),WM_MY_MESSAGE,NULL,NULL);
}
在OnDraw函数处设置断点，可以运行到此处，但在OnMyMsg处设置的断点却运行不到，这是为什么呢

[丢蛋鸡No1]

void ChuituView::OnLButtonDown(UINT nFlags, CPoint point) { m_pUiThread = (CUiThread*)AfxBeginThread(RUNTIME_CLASS(CUiThread)); m_pUiThread->PostThreadMessage(WM_DRAW,NULL,NULL); } m_pUiThread是view的成员变量