What i want to do is to swap the tab position,  and in the XT pro 8.61 , if i finish a function that create a new child window insert after the current active window, i will write the following code:

//create a new mdi child windows and insert after the current active

int CurSel;
CurSel = m_Tab->GetCurSel();

while((CurSel+1)<(m_Tab->GetItemCount()-1))
{
m_Tab->GetTabsArray().Swap(CurSel+1,m_Tab->GetItemCoun t()-1);

CurSel += 1;
}
m_Tab->Invalidate();