Need help in automating a simple process.

The thing is I need to change values in a popup window constantly.
Example 5000  to 6000.

I need to change the value from 5000 to 5100 whenever the window pops up.This process continues untill the value reaches 6000.
I need help in programming a simple robot which does this job for me.Please suggest.

Window details:

>>>> Window <<<<
Title:    Guard
Class:    #32770
Position:    374, 209
Size:    619, 306
Style:    0x94C820C4
ExStyle:    0x00010501
Handle:    0x00000000000706E8

>>>> Control <<<<
Class:    
Instance:    
ClassnameNN:    
Name:    
Advanced (Class):    
ID:    
Text:    
Position:    
Size:    
ControlClick Coords:    
Style:    
ExStyle:    
Handle:    

>>>> Mouse <<<<
Position:    588, 219
Cursor ID:    0
Color:    0x979797

>>>> StatusBar <<<<

>>>> ToolsBar <<<<

>>>> Visible Text <<<<
Input parameters
List1
&Load
&Save
OK
Cancel
Reset


>>>> Hidden Text <<<<
None
Help



Regards,
Radha