public static ToolStripDropDownButton addInLuoiItem(ToolStrip toolStripBar, TreeList treeList) { toolStripBar.SuspendLayout(); ToolStripSeparator InLuoiSep = new System.Windows.Forms.ToolStripSeparator(); InLuoiSep.Name = "InLuoiSep"; InLuoiSep.Size = new System.Drawing.Size(200, 20); ToolStripDropDownButton inLuoi = new System.Windows.Forms.ToolStripDropDownButton(); inLuoi.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.ImageAndText; inLuoi.Image = FWImageDic.PRINT_IMAGE20; inLuoi.ImageTransparentColor = System.Drawing.Color.Magenta; inLuoi.Name = "inLuoi"; inLuoi.Size = new System.Drawing.Size(200, 20); inLuoi.Text = "In danh sách"; ToolStripMenuItem itemIn = new ToolStripMenuItem("In"); itemIn.Name = "in"; itemIn.DisplayStyle = ToolStripItemDisplayStyle.Text; itemIn.Size = new System.Drawing.Size(200, 20); itemIn.Click += delegate(object sender, EventArgs e) { if (treeList != null) { treeList.Print(); } }; inLuoi.DropDownItems.Add(itemIn); ToolStripMenuItem itemXemTruoc = new ToolStripMenuItem("Xem trước"); itemXemTruoc.Name = "xemTruoc"; itemXemTruoc.DisplayStyle = ToolStripItemDisplayStyle.Text; itemXemTruoc.Size = new System.Drawing.Size(200, 20); itemXemTruoc.Click += delegate(object sender, EventArgs e) { HelpMsgBox._showWaitingMsg(delegate() { if (treeList != null) { treeList.ShowPrintPreview(); } }); }; inLuoi.DropDownItems.Add(itemXemTruoc); toolStripBar.Items.Add(InLuoiSep); toolStripBar.Items.Add(inLuoi); toolStripBar.ResumeLayout(false); toolStripBar.PerformLayout(); return inLuoi; }