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listbox getcurrentselection 优化

funcext/tvclib/utslvclstdctl.tsf

@@ -3257,9 +3257,29 @@ type TcustomListBox=class(TCustomListBoxbase)
         {**
         @explan(说明)获取当前选中项的索引，仅用于单选的列表框%%
         **}
-        if FMultisel=0 then
-        begin
-            return FSelBegin;
+        case FMultisel of 
+            0:      //µ¥Ñ¡
+            begin
+                return  FSelBegin;
+            end 
+            1:  //Á¬ÐøÑ¡Ôñ
+            begin
+                return array(FSelBegin,FSelEnd);    
+            end 
+            2:   //¼ä¶ÏÑ¡Ôñ
+            begin
+                r := array();
+                rl := 0;
+                for i,v in FMultisel3Data do 
+                begin
+                    if v then 
+                    begin
+                        r[rl] := i;
+                        rl++;
+                    end 
+                end 
+                return r;
+            end         
         end 
         return -1;
     end