How can I Change the MQL file to EXE

Hello Fellow Coders

I am new to this
I would like to change an XYYXYY.mql 4 advisor to XYYXYY.EXE file,
Can you kindly advise how to do that?

Also if I would like to hide one of the variables from the inputs screen
Say I don’t want to show MATrendPeriod, how to do that?

extern double TakeProfit = 50;
extern double Lots = 0.1;
extern double TrailingStop = 30;
extern double MACDOpenLevel=3;
extern double MACDCloseLevel=2;
extern double MATrendPeriod=26; How to hide this one?

Appreciate your assistance.
Best of luck
Alkhataat

Get rid of the word "extern" in front of it... that way it's a hardcoded variable within the program, and not something someone can change externally.