Win32 Tab Control w/Multiple Rows - c++

Question

I have a tab control in my Win32 application. The control is multi-row capable. When I resize the window such that the tab control is reduced in width, multiple rows show up. The problem is that when I click on one of the lower rows the tabs in the upper rows are blocked by the current tab's window( the tab control doesn't properly resize the content window of the current tab so that the upper rows are visible ). How do I account for this problem?
Here is code for my resize function:
RECT cr;
GetClientRect( pHdr->hWndTab, &cr );
TabCtrl_AdjustRect( pHdr->hWndTab, FALSE, &cr );
OffsetRect( &cr, cxMargin - cr.left, cyMargin - cr.top );
SetWindowPos( pHdr->hWndDisplay, 0, cr.left, cr.top, cr.right, cr.bottom, SWP_SHOWWINDOW );
This code comes from Microsoft website...
pHdr->hWndTab is the window handle for the tab control
pHdr->hWndDisplay is the window handle for the content window of the current tab
EDIT: Actually, after clicking the lower tabs, the upper tabs move to the top of control...however, they are still blocked by the content window...

Answer 1

I fixed the problem by adjusting the display rectangle after offsetting:
typedef struct tag_dlghdr
{
HWND hWndTab;
HWND hWndDisplay;
RECT rcDisplay;
DLGTEMPLATE *apRes[ MAX_PAGES ];
DLGPROC MsgProc[ MAX_PAGES ];
}DLGHDR
Resize( HWND hWndDlg )
{
DLGHDR *pHdr = ( DLGHDR * )GetWindowLong( hWndDlg, GWL_USERDATA );
DWORD dwDlgBase = GetDialogBaseUnits();
int cxMargin = LOWORD( dwDlgBase ) / 4;
int cyMargin = HIWORD( dwDlgBase ) / 8;
m_niCurTabSel = TabCtrl_GetCurSel( pHdr->hWndTab );
RECT cr;
GetClientRect( pHdr->hWndTab, &cr );
TabCtrl_AdjustRect( pHdr->hWndTab, FALSE, &cr );
OffsetRect( &cr, cxMargin - cr.left, cyMargin - cr.top );
CopyRect( &pHdr->rcDisplay, &cr );
TabCtrl_AdjustRect( pHdr->hWndTab, FALSE, &pHdr->rcDisplay );
SetWindowPos( pHdr->hWndDisplay, 0, pHdr->rcDisplay.left, pHdr->rcDisplay.top, pHdr->rcDisplay.right, pHdr->rcDisplay.bottom, SWP_SHOWWINDOW );
}