Set my calculations to radians

[Powersoft]

I have the atan2 function as:

atan2(y,x)
BEGIN
RETURN ARG(x+i*y);
END;

How can I set the mode to radians or decimal from the code?

[roadrunner]

HAngle:=0; // radians
HAngle:=1; // degrees
HAngle:=2; // gradians

[Albert Chan]

Or, without changing default setting

AAngle := 0 // Home setting
AAngle := 1 // radians
AAngle := 2 // degrees
AAngle := 3 // gradians