Ctreectrl's basic code

Ctreectrl * p_tree = (ctreectrl *) getdlgitem (idc_tree1 );
Tvinsertstruct insertstut;
Insertstut. hinsertafter = NULL;
Insertstut. hparent = NULL;
Insertstut. item. psztext = _ T ("China ");
Insertstut. item. Mask = tvif_text;
Htreeitem hcountry = p_tree-> insertitem (& insertstut );
Htreeitem hprovince = p_tree-> insertitem (tvif_text, "Henan Province", 0, 0, 0, 0, hcountry, null );
Htreeitem hprovince1 = p_tree-> insertitem (tvif_text, "Henan 1", 0, 0, 0, 0, hcountry, null );
Htreeitem hprovince2 = p_tree-> insertitem (tvif_text, "Henan Province 2", 0, 0, 0, 0, hcountry, hprovince );

P_tree-> insertitem (_ T ("pitt0000gh"), hprovince, tvi_sort );
P_tree-> insertitem (_ T ("Harrisburg"), hprovince, tvi_sort );
P_tree-> insertitem (_ T ("Altoona"), hprovince, tvi_sort );

insertstut. item. psztext = "Russia";
htreeitem hcountry1 = p_tree-> insertitem (& insertstut);
p_tree-> Expand (hcountry, tve_expand);