diff --git a/ZCppMain/ZtCStringEx.H b/ZCppMain/ZtCStringEx.H
index 72e7752..e5c27f8 100644
--- a/ZCppMain/ZtCStringEx.H
+++ b/ZCppMain/ZtCStringEx.H
@@ -960,7 +960,7 @@ namespace ZNsMain
         {
             // AL_NewSize>ml_UseLen 이면 추가되는 부분은 AC_FillChar 로 채운다.
 
-            if(AL_NewSize<=ml_UseLen)   return Invalidate(AL_NewSize);
+            if(AL_NewSize<=ml_UseLen) return Invalid(AL_NewSize);
 
             TypeLength VL_PrevSize=ml_UseLen;  ReAllocKeep(AL_NewSize);
 
@@ -1071,15 +1071,12 @@ namespace ZNsMain
         /*#############################################################################*/
 
 
-        ZCStringBase& Invalidate(TypeLength AL_Index=0)
-        {
-            if(AL_Index>=0 && AL_Index<ml_UseLen) mpc_Data[ml_UseLen=AL_Index]=0;  return *this;
-        }/*
-        ZCStringBase& Invalidate(TypeLength AL_Index=0)*/
-
         ZCStringBase& Invalid(TypeLength AL_Index=0)
         {
-            if(AL_Index>=0 && AL_Index<ml_UseLen) mpc_Data[ml_UseLen=AL_Index]=0;  return *this;
+            if(AL_Index>=0 && AL_Index<ml_UseLen)
+                mpc_Data[ml_UseLen=AL_Index]=0;
+
+            return *this; /*+++++++++++++++++++*/
         }/*
         ZCStringBase& Invalid(TypeLength AL_Index=0)*/
 
@@ -1107,7 +1104,7 @@ namespace ZNsMain
 
         ZCStringBase& InvalidByForce(TypeLength AL_Index=0)
         {
-            // Invalidate() 와의 차이에 주의
+            // Invalid() 와의 차이에 주의
 
             const bool CB_IsOK = /*<<<<<<<<<<<<<<<<<*/
                 (
@@ -1259,7 +1256,7 @@ namespace ZNsMain
 
             if(rhs.ml_UseLen<1)
             {
-                Invalidate(); return *this;
+                Invalid(); return *this;
             }/*
             /////////////////*/
 
@@ -1287,13 +1284,13 @@ namespace ZNsMain
 
         ZCStringBase& operator=(const ZCCharView& AR_View)
         {
-            Invalidate(); return (*this)(AR_View.data(), AR_View.size());
+            Invalid(); return (*this)(AR_View.data(), AR_View.size());
         }/*
         ZCStringBase& operator=(const ZCCharView& AR_View)*/
 
-        ZCStringBase& operator=(int    AI_Int   ){Invalidate(); return (*this)(AI_Int   );}
-        ZCStringBase& operator=(long   AL_Long  ){Invalidate(); return (*this)(AL_Long  );}
-        ZCStringBase& operator=(double AD_Double){Invalidate(); return (*this)(AD_Double);}
+        ZCStringBase& operator=(int    AI_Int   ){Invalid(); return (*this)(AI_Int   );}
+        ZCStringBase& operator=(long   AL_Long  ){Invalid(); return (*this)(AL_Long  );}
+        ZCStringBase& operator=(double AD_Double){Invalid(); return (*this)(AD_Double);}
 
 
         bool operator==(TypeCharC* APC_Data) const{return Minus(APC_Data)==0 ;}
@@ -1489,7 +1486,7 @@ namespace ZNsMain
         {
             if(AL_Length<1)
             {
-                Invalidate(); return *this;
+                Invalid(); return *this;
             }
             /*<<<<<<<<<<<*/
 
@@ -1939,17 +1936,17 @@ namespace ZNsMain
 
         ZCStringBase& ConvertLLong()
         {
-            ZNsMain::ZTypLLong LLongValue=ZNsMain::ZfAtoLL(mpc_Data);
+            ZNsMain::ZTypLLong LLongValue = ZNsMain::ZfAtoLL(mpc_Data);
 
-            this->Invalidate(); return (*this)(LLongValue);
+            this->Invalid(); return (*this)(LLongValue);
         }/*
         ZCStringBase& ConvertLLong()*/
 
         ZCStringBase& ConvertLong()
         {
-            ZNsMain::ZTypLLong LongValue=ZNsMain::ZfAtoL(mpc_Data);
+            ZNsMain::ZTypLLong LongValue = ZNsMain::ZfAtoL(mpc_Data);
 
-            this->Invalidate(); return (*this)(LongValue);
+            this->Invalid(); return (*this)(LongValue);
         }/*
         ZCStringBase& ConvertLong()*/
 
@@ -2512,8 +2509,8 @@ namespace ZNsMain
                     if(VL_SearchPos2-VL_SearchPos1-AL_SearchLen1<1)
                     {
                         return *this; // 찾은 두 문자열 사이에 문자가 없을 때
-                    }/*
-                    /////////////////////////////////////////////*/
+                    }
+                    /*:::::::::::::::::::::::::::::::::::::::::::*/
 
                     return ReplaceSection
                         (
@@ -2537,8 +2534,8 @@ namespace ZNsMain
             }
             else if(AB_IsExactTwo==false && VL_SearchPos1>=0 && VL_SearchPos2<0)
             {
-                if(AB_DoKeepSearch==true) Invalidate(VL_SearchPos1+AL_SearchLen1);
-                else                      Invalidate(VL_SearchPos1);
+                if(AB_DoKeepSearch) Invalid(VL_SearchPos1+AL_SearchLen1 );
+                else                Invalid(VL_SearchPos1               );
             }/*
             else if(AB_IsExactTwo==false && VL_SearchPos1>=0 && VL_SearchPos2<0)*/
 
@@ -4024,11 +4021,11 @@ namespace ZNsMain
                     }
                     else
                     {
-                        ((ZCString&)ARR_SaveList).Invalidate().append
+                        ((ZCString&)ARR_SaveList).Invalid().append
                             (
                                 APC_OriginChar+VL_CopyStartPos, VL_Index-VL_CopyStartPos
                             ) ;
-                        /////////////////////////////////////////////
+                        //////////////////////////////////////////
                     }/*
                     else*/
                 }
@@ -4053,7 +4050,7 @@ namespace ZNsMain
                 { ((ZCStringBase&)ARR_SaveList).
                       append( APC_OriginChar+VL_CopyStartPos, AL_OriginLen-VL_CopyStartPos ) ;
                 }else
-                { ((ZCStringBase&)ARR_SaveList).Invalidate().
+                { ((ZCStringBase&)ARR_SaveList).Invalid().
                       append( APC_OriginChar+VL_CopyStartPos, AL_OriginLen-VL_CopyStartPos ) ;
                 }
             }/*
@@ -4286,7 +4283,7 @@ namespace ZNsMain
 
                 if(VL_Index>VL_CopyStartPos)
                 {
-                    VO_CStringTemp.Invalidate();
+                    VO_CStringTemp.Invalid();
 
                     ARR_SaveList.push_back ////////////////////
                         (
@@ -4319,7 +4316,7 @@ namespace ZNsMain
                 /*  VL_PrevListSize==ARR_SaveList.size() 인 경우는, 분리
                     문자열을 찾을 수 없는 경우다. 이때는 아무짓도 하지 말자.
                 */
-                VO_CStringTemp.Invalidate();
+                VO_CStringTemp.Invalid();
 
                 ARR_SaveList.push_back ////////
                     (
@@ -4795,7 +4792,7 @@ namespace ZNsMain
 
                     if(VL_CopyPos<VL_StartPos)
                     {
-                        VO_CStringTemp.Invalidate();
+                        VO_CStringTemp.Invalid();
 
                         ARR_SaveList.push_back
                             (
@@ -4821,7 +4818,7 @@ namespace ZNsMain
 
             if(VL_CopyPos<AL_OriginLen)
             {
-                VO_CStringTemp.Invalidate();
+                VO_CStringTemp.Invalid();
 
                 ARR_SaveList.push_back
                     (
@@ -4910,19 +4907,26 @@ namespace ZNsMain
 
                 if(AB_DoIncludeSearch==true)
                 {
-                    ((ZCStringBase&)ARR_SaveList).Invalidate().append(
-                        APC_OriginChar+VL_Pos1              , VL_Pos2-VL_Pos1+AL_Search2Len) ;
+                    ((ZCStringBase&)ARR_SaveList).Invalid().append
+                        (
+                            APC_OriginChar+VL_Pos1, VL_Pos2-VL_Pos1+AL_Search2Len
+                        ) ;
+                    /*::::::::::::::::::::::::::::::::::::::::::*/
                 }
                 else if(VL_Pos2>VL_Pos1+AL_Search1Len) // AB_DoIncludeSearch==false
                 {
-                    ((ZCStringBase&)ARR_SaveList).Invalidate().append(
-                        APC_OriginChar+VL_Pos1+AL_Search1Len, VL_Pos2-VL_Pos1-AL_Search1Len) ;
+                    ((ZCStringBase&)ARR_SaveList).Invalid().append
+                        (
+                            APC_OriginChar + VL_Pos1+AL_Search1Len,
+                            VL_Pos2-VL_Pos1- AL_Search1Len
+                        ) ;
+                    /*::::::::::::::::::::::::::::::::::::::::::*/
 
                     // APC_Search1Char 와 APC_Search2Char 사이에 문자열이 하나 이상 있어야 한다.
                 }/*
                 else if(VL_Pos2>VL_Pos1+AL_Search1Len) // AB_DoIncludeSearch==false*/
 
-                VL_Pos1=VL_Pos2+AL_Search2Len;
+                VL_Pos1 = VL_Pos2+AL_Search2Len;
             }/*
             while ( //////////////////////////////////////////////
                     (   VL_Pos1 = FindPos
@@ -5059,13 +5063,20 @@ namespace ZNsMain
 
                 if(AB_DoIncludeSearch==true)
                 {
-                    ((ZCString&)ARR_SaveList).Invalidate().append(
-                        APC_OriginChar+VL_Pos1              , VL_Pos2-VL_Pos1+AL_Search2Len) ;
+                    ((ZCString&)ARR_SaveList).Invalid().append
+                        (
+                            APC_OriginChar+VL_Pos1, VL_Pos2-VL_Pos1+AL_Search2Len
+                        ) ;
+                    /*::::::::::::::::::::::::::::::::::::::*/
                 }
                 else if(VL_Pos2>VL_Pos1+AL_Search1Len) // AB_DoIncludeSearch==false
                 {
-                    ((ZCString&)ARR_SaveList).Invalidate().append(
-                        APC_OriginChar+VL_Pos1+AL_Search1Len, VL_Pos2-VL_Pos1-AL_Search1Len) ;
+                    ((ZCString&)ARR_SaveList).Invalid().append
+                        (
+                            APC_OriginChar + VL_Pos1+AL_Search1Len,
+                            VL_Pos2-VL_Pos1- AL_Search1Len
+                        ) ;
+                    /*::::::::::::::::::::::::::::::::::::::*/
 
                     // APC_Search1Char 와 APC_Search2Char 사이에 문자열이 하나 이상 있어야 한다.
                 }/*
@@ -6386,7 +6397,7 @@ namespace ZNsMain
 
         ZCStringBase& PadLeft(TypeLength AL_NewSize, TypeChar AC_FillChar=' ')
         {
-            if(AL_NewSize<=ml_UseLen) return Invalidate(AL_NewSize);
+            if(AL_NewSize<=ml_UseLen) return Invalid(AL_NewSize);
 
             return MoveRight(AL_NewSize-ml_UseLen, AC_FillChar);
         }/*
@@ -6395,7 +6406,7 @@ namespace ZNsMain
         ZCStringBase& PadRight(TypeLength AL_NewSize, TypeChar AC_FillChar=' ')
         {
             if(AL_NewSize<=ml_UseLen)
-                { return Invalidate(AL_NewSize); }
+                { return Invalid(AL_NewSize); }
 
             this->ReAllocKeep(AL_NewSize);
 
@@ -6835,7 +6846,7 @@ namespace ZNsMain
             if(AL_StartPos<0)
                 return *this; // 확장자 구분표시 '.' 이 없을 경우
             else
-                return Invalidate(AL_StartPos);
+                return Invalid(AL_StartPos);
           //else
         }/*
         ZCStringBase& MinusExt()*/