The TVM_GETITEM message retrieves some or all of a tree-view item’s attributes. You can send this message explicitly or by using the TreeView_GetItem macro.
TVM_GETITEM wParam = 0; lParam = (LPARAM) (TV_ITEM FAR*) pitem;
If the mask member specifies the TVIF_TEXT value, the pszText member must contain the pointer to the buffer that receives the item text and the cchTextMax member must specify the size of the buffer.
If the mask member specifies the TVIF_STATE value, the stateMask member must specify the item state bits to retrieve. On output, the state member contains the values of the specified state bits.
Returns TRUE if successful or FALSE otherwise.