* UITreeView：背景色可改，设置FillColor，以及SystemCustomMode = true

SunnyUI.Demo/Controls/FTreeView.Designer.cs

@@ -72,11 +72,13 @@
             // 
             // uiTreeView1
             // 
-            this.uiTreeView1.BackColor = System.Drawing.Color.White;
+            this.uiTreeView1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(192)))), ((int)(((byte)(192)))));
             this.uiTreeView1.CheckBoxes = true;
+            this.uiTreeView1.FillColor = System.Drawing.Color.White;
             this.uiTreeView1.Font = new System.Drawing.Font("微软雅黑", 12F);
             this.uiTreeView1.Location = new System.Drawing.Point(33, 54);
             this.uiTreeView1.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
+            this.uiTreeView1.MinimumSize = new System.Drawing.Size(1, 1);
             this.uiTreeView1.Name = "uiTreeView1";
             treeNode1.Name = "节点8";
             treeNode1.Text = "节点8";
@@ -130,6 +132,8 @@
             this.uiTreeView1.SelectedNode = null;
             this.uiTreeView1.ShowLines = true;
             this.uiTreeView1.Size = new System.Drawing.Size(266, 313);
+            this.uiTreeView1.Style = Sunny.UI.UIStyle.Custom;
+            this.uiTreeView1.StyleCustomMode = true;
             this.uiTreeView1.TabIndex = 0;
             this.uiTreeView1.Text = null;
             // 

SunnyUI/Controls/UITreeView.cs

@@ -66,8 +66,9 @@ namespace Sunny.UI
             if (view != null)
             {
                 view.SelectedForeColor = UIColor.White;
+                view.FillColor = view.BackColor = fillColor = UIColor.White;
+
                 rectColor = uiColor.RectColor;
-                view.BackColor = fillColor = UIColor.White;
                 view.SelectedColor = uiColor.TreeViewSelectedColor;
                 view.ForeColor = foreColor = UIFontColor.Primary;
                 view.HoverColor = uiColor.TreeViewHoverColor;
@@ -76,6 +77,7 @@ namespace Sunny.UI
             if (Bar != null)
             {
                 Bar.FillColor = UIColor.White;
+
                 Bar.ForeColor = uiColor.PrimaryColor;
                 Bar.HoverColor = uiColor.ButtonFillHoverColor;
                 Bar.PressColor = uiColor.ButtonFillPressColor;
@@ -92,6 +94,11 @@ namespace Sunny.UI
                 view.FillColor = color;
                 view.BackColor = color;
             }
+
+            if (Bar != null)
+            {
+                Bar.FillColor = color;
+            }
         }
 
         protected override void AfterSetForeColor(Color color)