Change the TreeView item height

Problem/Question/Abstract:

How to change the TreeView item height?

Answer:

uses CommCtrl;

{ .... }

procedure SetTreeViewItemHeight(aTreeView: TTreeView; aItemHeight: Word);
begin
aTreeView.Perform(TVM_SETITEMHEIGHT, aItemHeight, 0);
end;

// Example:

procedure TForm1.Button1Click(Sender: TObject);
begin
SetTreeViewItemHeight(TreeView1, 30);
end;