Dynamic GUI Creation

#include <ButtonConstants.au3>
#include <EditConstants.au3>
#include <GUIConstantsEx.au3>
#include <StaticConstants.au3>
#include <WindowsConstants.au3>

Global $iCount = 1 ; Number 1 is used for basic element
Global $Element_For_Column = 3 ; Max number of element for column
Global $Max_Element = 9 ; Number of total element
Global $Move_Top, $Move_Left, $hGUISize_Height, $hGUISize_Width, $Temp_iCount

$hGUI = GUICreate("Dynamic GUI", 233, 107, -1, -1)
$Label_A1 = GUICtrlCreateLabel("This is a label n°1", 8, 26, 90, 17)
GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
$Input_A1 = GUICtrlCreateInput("", 8, 43, 161, 21)
GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
$Button_A1 = GUICtrlCreateButton("1", 176, 41, 51, 25)
GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
$Button_A2 = GUICtrlCreateButton("Check Input", 8, 72, 75, 25)
GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
$Button_Minus = GUICtrlCreateButton("-", 176, 2, 19, 25)
GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
$Button_Plus = GUICtrlCreateButton("+", 210, 2, 19, 25)
GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
GUISetState(@SW_SHOW)

While 1
 $nMsg = GUIGetMsg()
 Switch $nMsg
  Case $GUI_EVENT_CLOSE
   Exit
  Case $Button_A1
   GUICtrlSetData($Input_A1, "You have clicked button 1")
  Case $Button_A2
   _Test_Func($Input_A1)
  Case $Button_Plus
   _Add_Element()
  Case $Button_Minus
   Delete_Element()
 EndSwitch
WEnd

Func _Test_Func($Value)
 MsgBox(0, "Test", "This is the value of Input:" & @CRLF & GUICtrlRead($Value))
EndFunc   ;==>_Test_Func

Func _Add_Element()
 Local $Size = WinGetClientSize($hGUI, "")
 Local $hGUISize_Height = 120, $hGUISize_Width = 250
 $Temp_iCount += 1
 $iCount += 1
 $Move_Top += 90
 If $Temp_iCount = $Element_For_Column Then
  If $iCount <= $Max_Element Then
   WinMove($hGUI, "", Default, Default, $Size[0] + $hGUISize_Width, Default)
   _Middle($hGUI, "")
   $Move_Top = "" ; reset top
   $Move_Left += 240 ; create left vaule
   $Temp_iCount = "" ; reset temp_element
  EndIf
 EndIf
 If $iCount <= $Max_Element Then
  If $iCount <= $Element_For_Column Then
   GUICtrlCreateLabel("This is a label n°" & $iCount, 8, 26 + $Move_Top, 90, 17) ; how to set the varable name?
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
   GUICtrlCreateInput("", 8, 43 + $Move_Top, 161, 21)
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
   GUICtrlCreateButton($iCount, 176, 41 + $Move_Top, 51, 25)
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
   GUICtrlCreateButton("Check Input", 8, 72 + $Move_Top, 75, 25)
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
   WinMove($hGUI, "", Default, Default, Default, $Size[1] + $hGUISize_Height)
   _Middle($hGUI, "")
  Else
   GUICtrlCreateLabel("This is a label n°" & $iCount, 8 + $Move_Left, 26 + $Move_Top, 90, 17) ; how to set the varable name?
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
   GUICtrlCreateInput("", 8 + $Move_Left, 43 + $Move_Top, 161, 21)
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
   GUICtrlCreateButton($iCount, 176 + $Move_Left, 41 + $Move_Top, 51, 25)
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
   GUICtrlCreateButton("Check Input", 8 + $Move_Left, 72 + $Move_Top, 75, 25)
   GUICtrlSetResizing(-1, BitOR($GUI_DOCKTOP, $GUI_DOCKLEFT, $GUI_DOCKSIZE))
  EndIf
 EndIf
EndFunc   ;==>_Add_Element

Func Delete_Element()
 ;???
EndFunc   ;==>Delete_Element

Func _Middle(Const $win, Const $txt) ; Snippet Valuater - cdkid
 Local Const $Size = WinGetClientSize($win, $txt)
 Local Const $y = (@DesktopHeight / 2) - ($Size[1] / 2)
 Local Const $x = (@DesktopWidth / 2) - ($Size[0] / 2)
 Return WinMove($win, $txt, $x, $y)
EndFunc   ;==>_Middle