How to pass variables to MyFunction?

After hour of messing around with variables / searching forums / reading manual I found no way to pass a variable to custom function.. Is that true?? (guess not, I'm just being blind)

Like,

Function DoYourThings

  DoSomeStuffTo ${variable}

  DoSomeOtherStuffTo ${variable}

FunctionEnd

Then in some section:

Call DoYourThings "c:\temp\blahzor.txt"

And the DoYourThings-function receives "c:\temp\blahzor.txt" and some variable that can be accessed. Simple :P
Of course that does not work, Call won't accept parameters.

Also, I was not able to declare a changable variable as public, to do the same thing a harder way, like this:

var SOMEVAR



Function DoYourThings

  DoSomeStuffTo ${SOMEVAR}

  DoSomeOtherStuffTo ${SOMEVAR}

FunctionEnd



Section "SomeSection"

  StrCpy "$SOMEVAR" "c:\temp\blahzor.txt" 

  Call DoYourThings

SectionEnd

This does not work either, DoYourThings-function can't access SOMEVAR

😢

Defined variables are those which have only a "$" before its name:

Var Test
Section
MessageBox MB_OK $TEST
SectionEnd 

Defines with a variable name value are like normal constant defines, but everytime when the variable set as the define's value, the define's value changes, so it's dependant of another variable's value:

!define TEST $0
Section
MessageBox MB_OK ${TEST}
SectionEnd