Inno Setup Pascal Script documentation - api

Question

I started to use Inno Setup as I thought the Pascal Scripting would make it a lot easier for me to do custom stuff, compared to NSIS. However, it seems that there is no documentation anywhere on the Web? The official Wiki has been deleted and I can't find any API documentation. There was an earlier question (3 years-old, an eternity!) which ended in the sad statement that nothing existed.
So far I was able to get help (mostly on Stackoverflow ;-)) each time I wanted to do something specific but I don't want to go accross forums each time I want to do something. My problem right now is to create a directory if it doesn't exist, and I haven't find anyone asking this question yet. So I'm asking. If you know how to do it, can you please tell me (how to do it ;-)) and where you learnt it?
Thanks!

Answer 1

Pascal script syntax is very close to the Pascal/Delphi syntax, so you have a lot of documentation in the Delphi DocWiki and Free pascal documentation about it.
The best place I know about inno-setup specific pascal script function support is the PascalScript section in the Inno Setup Help File, the most relevant sections are:
Support Functions Reference
Support Class Reference
Using DLLs
As for your last question, take a look at this:
var
DocPath: string;
DirPath: string;
begin
DocPath := ExpandConstant('{userdocs}');
DirPath := DocPath + '\ISTest';
if not DirExists(DirPath) then
begin
if not CreateDir(DirPath) then
MsgBox(SysErrorMessage(DLLGetLastError), mbError, mb_Ok);
end;
end;
Where I learned it? I'm a Delphi developer, and the aim of pascal script is to be close to Delphi, so I think I really learned it by learning Delphi. Nowadays, before to take a look at the documentation, I try to do what I want to do a la Delphi, and if I fail doing so, I resort to documentation as a last resource.