把MDI当TAB用

 最近做某个垃圾软件，有些子窗口只想它实例化一个，所以就顺手弄了个垃圾。

原理就是在主窗体找到MDIClient，然后按标题找MDI窗体，不存在实例化一个，存在就顶置它。

 

//只实例化一个MDI的代码
 if(!checkreg()) return;
 CString YourMdiTitle;
 #define YourMdiClass pcsvsall //后面替换为你的类
 YourMdiTitle=L"MDI标题可修改";//MDI标题可修改
 HWND parent = ::FindWindowEx(AfxGetMainWnd()-> m_hWnd,NULL, L"MDIClient",NULL);
 HWND child = ::FindWindowEx(parent,NULL,NULL, YourMdiTitle);
 if(NULL == child)
 {
 CMainFrame* pMainWnd = (CMainFrame*)AfxGetMainWnd();
 CMDIChildWnd* pChildWnd = pMainWnd->CreateNewChild(RUNTIME_CLASS(CMDIChildWnd), IDR_MAINFRAME );
 pChildWnd->SetWindowTextW(YourMdiTitle);//pChildWnd->SetTitle(YourMdiTitle);
 pChildWnd->ShowWindow(SW_MAXIMIZE);
 CCreateContext context;
 context.m_pNewViewClass = RUNTIME_CLASS(YourMdiClass);
 //context.m_pCurrentDoc = this;
 YourMdiClass* pNewView = STATIC_DOWNCAST(YourMdiClass, pChildWnd->CreateView(&context));
 {//你的其他初始化代码
 //
 //pNewView->m_ppPcs=&m_pAll[2];
 //pNewView->m_ppAll=&m_pAll[7];
 }
 //pChildWnd->SetWindowTextW(YourMdiTitle);
 }
 else
 {
 ::BringWindowToTop(child);
 }