Tabctrl VB and mfc how to get previous tab index

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i have query regarding the VB Code as mentioned below:

tabMain_Click(PreviousTab As Integer)

in vb there is parameter i.e previous tab which shows some value by default as my tab is fixed to 1 it should show always zero but it is showing some times different values in vb.

basically my doubt is how to get the previous tab index in mfc as olny have current selection or getavtivepageindex ?

What I have tried:

i tried onnotify

NMHDR* pnmh = (NMHDR*)lParam;

if ( TCN_SELCHANGE == pnmh->code )

Posted 7-May-18 2:35am

Member 13798855

Updated 7-May-18 2:46am

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Jochen Arndt · Answer 1 · 2018-05-07T02:47:00

Solution 1

Add a notification handler for the TCN_SELCHANGING notification code (Windows)[^] and get the actual (soon previous) index with TabCtrl_GetCurSel macro (Windows)[^]. Optionally store that in a member variable.

Posted 7-May-18 2:47am

Jochen Arndt

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Member 13798855 9-May-18 10:19am

but we will get only current index i want previous index

Jochen Arndt 9-May-18 11:55am

That notification is send before the change takes effect so that the actual index at that time is the previous one when the TCN_SELCHANGE notification is handled. If you store the index in a member variable within that handler, you can access it after the change has occured and have the previous index.