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There was an error in MFC TabCtrl child pages to create

Time:09-23

The code is as follows:
//to the Tab Control increase five page
M_tab. InsertItem (0, _T (" user payment details "));
M_tab. InsertItem (1, _T (" balance of payments statistics and information "));
Chart m_tab. InsertItem (2, _T (" statistical information "));
M_tab. InsertItem (3, _T (" software use log "));
//create dialog
M_page1. Create (IDD_PAGE1, & amp; M_tab);
M_page2. Create (IDD_PAGE2, & amp; M_tab);
M_page3. Create (IDD_PAGE3, & amp; M_tab);
M_page4. Create (IDD_PAGE4, & amp; M_tab);

Page created in the first two are no problem, but it occurs when the third problem, error location: ACOleControlSiteOrWnd * pTemp=
New COleControlSiteOrWnd (
HwndCtrl,
POccDlgInfo - & gt; M_pItemInfo [I] bAutoRadioButton);
The hwndCtrl is empty, this is the inside of the library file, I don't know why is empty, how to change my code?

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