c# SendKeys.SendWait function, send numpad digits

Question

so I was working on an application which supposed executes digit keys for another application which isn't made by me, this application only supports numpad digits and it doesn't support the digits below F1-12s so whenever I execute "{number}" or just "number" ex:

SendKeys.SendWait("{1}"); 

or

SendKeys.SendWait("1");

just simple nothing happens, any one got idea on how to send number as numpad digit?

Answer 1

I've found my answer on this topic

How to simulate a Ctrl A + Ctrl C using keybd_event

here's the area to find keys: https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731(v=vs.85).aspx