How to set DestDir to a vairable in Inno Setup ?

[Zhencheng Fu]

Hello, I have to get my installation destination directory from Windows register. The result is saved in a vairaible in [Code] section. Then my question is how to use this variable as my DestDir in [Files] section?

For example, I wrote DestDir : {code: MyVariable} without success. Then writing a function like this:

function GetDestDir(): String;
begin
  Result := ExpandConstant(MyVariable);
end;

writing DestDir: {code: GetDestDir} is still unluck.

Any help are appreciated.

[Gavin Lambert]

See https://jrsoftware.org/ishelp/index.php?topic=scriptconstants.  The parameter declaration is required.