How avoiding flickering ?

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VC++

Hello,

On my Dialog i programmatically set some texts as button caption. Il also update a treeview control.By using theses actions we can observe durant less than a second a flickering.
I try do the following instruction but it don't work.

Can someone help me?

What I have tried:

This is what i tried without any success :

CWaitCursor wait;
SetRedraw(FALSE); 
/* my instructions here ----------------------
-----
-----
/*----------------------------------------------*/
SetRedraw(TRUE);
RedrawWindow(); 

Thank's in advance