added setter and getter for group column header

BBjGridExWidget.bbj

@@ -587,6 +587,22 @@ rem --------------------api methods--------------------------------
         #EnableFilter=enable
     methodend    
 
+    rem /**
+    rem  * set the label for the group column if the grid is a tree-grid
+    rem  * defaults to "Group"
+    rem  * @param label$ - the label
+    rem  */
+    method public void setGroupColumnLabel(BBjString label$)
+        #GroupColumnLabel$ = label$
+    methodend
+
+    rem /**
+    rem  * get the label for the group column if the grid is a tree-grid
+    rem  * @returns label$ 
+    rem  */
+    method public BBjString getGroupColumnLabel()
+        return #GroupColumnLabel$
+    methodend
 
     method public BBjGridExWidgetColumnState getColumnsState()
 

Demo/TreeDemo.bbj

@@ -16,6 +16,8 @@ wnd! = BBjAPI().openSysGui("X0").addWindow(10,10,1024,768,"BBj Grid Ex Demo")
 
 grid! = new BBjGridExWidget(wnd!,100,0,0,1024,768)
 
+grid!.setGroupColumnLabel("Customer")
+
 wnd!        .setCallback(BBjAPI.ON_CLOSE,"byebye")
 wnd!        .setCallback(BBjAPI.ON_RESIZE,"resize")