Simulate calculator clicks to add two numbers

While 1
; Asks user for first number in the adding equation
 
Local $iNum1 = InputBox('Adding!', 'Enter your first number')
 
; Validates input is a positive integer
If $iNum1 < 0 Then
    MsgBox(0, 'Error', 'Please enter a valid positive integer')
Else 
ExitLoop
EndIf
WEnd
 
While 2
; Asks user for second number in the adding equation
 
Local $iNum2 = InputBox('Adding!', 'Enter your second number')
 
; Validates input is a positive integer
If $iNum2 < 0 Then
    MsgBox(0, 'Error', 'Please enter a valid positive integer')
Else 
ExitLoop
EndIf
WEnd
 
; Calculates the two inputs without using "send" command
 
Run('calc.exe', @SystemDir)
WinWaitActive('Calculator')
 
ControlClick('Calculator', '', '130')
ControlClick('Calculator', '', '131')
ControlClick('Calculator', '', '132')
ControlClick('Calculator', '', '133')
ControlClick('Calculator', '', '134')
ControlClick('Calculator', '', '135')
ControlClick('Calculator', '', '136')
ControlClick('Calculator', '', '137')
ControlClick('Calculator', '', '138')
ControlClick('Calculator', '', '139')
 
#cs
 
$x = $iNum1
 
$z = StringLen($x)
 
For $iNum1 = 0 to $z
    Case 1