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hi people

I am using resource files, and I am having some problems with a tabcontrol and its child window.
when I change the tab's caption using TCM_SETITEM the child window disappears.
this is part of my code.

;-- WM_INITDIALOG
;-- insertar el primer tab
mov tab.imask, TCIF_TEXT
mov tab.pszText, offset szMessage
mov tab.cchTextMax, sizeof szMessage
call SendDlgItemMessage, handle, ID_TABCONTROL, TCM_INSERTITEM, 0, addr tab

;-- crear dlg del primer tab
call GetDlgItem, handle, ID_TABCONTROL
mov hTabControl, eax
call CreateDialogParam, lparam, ID_DLGTAB, eax, offset TabWndProc, 0
mov hTabWnd, eax

I change it this way

mov tab.imask, TCIF_TEXT
mov tab.pszText, esi ; esi points to new caption
call SendDlgItemMessage, hMainWnd, ID_TABCONTROL, TCM_SETITEM, 0, addr tab

thank you.

add the following

mov tab.imask, TCIF_TEXT
mov tab.pszText, esi ; esi points to new caption
call SendDlgItemMessage, hMainWnd, ID_TABCONTROL, TCM_SETITEM, 0, addr tab
invoke InvalidateRect,hTab,0,TRUE