Question

MFC MDI框架，加载了CFromView视图，视图上有控件，但是一切换程序，CFromView视图和视图上的控件消失

MainFrm中的OnCreate函数
CCreateContext context;
CChildFrame *ChildF;
ChildF = new CChildFrame();
context.m_pNewViewClass = RUNTIME_CLASS(CFormDlg);
context.m_pCurrentDoc = new TestDoc();
if (!ChildF->LoadFrame(IDR_MAINFRAME,WS_OVERLAPPEDWINDOW&(~WS_MAXIMIZEBOX)&(~WS_THICKFRAME),this,&context))
{
AfxMessageBox(_T("加载出错！"));
}
ChildF->SetWindowText(_T("PowerMac"));
ChildF->MoveWindow(CRect(0,0,500,500));
Sleep(700);
ChildF->ShowWindow(SW_SHOWNORMAL);
ChildF->InitialUpdateFrame(NULL,true);
UpdateWindow();

Answer 1

切换窗口，改变窗口大小。会引起窗口重绘。在OnDraw函数做文章