External Methods & Cross-platform Development

Getting Started
1

Hello,

I’ve recently discovered Xojo, and am contemplating spending the next year or so porting a massive VB6 application over to it. If it’s looking like it can be done, I’ll buy a licence and join the club.

In my initial playing around, I’m trying to see how hard it would be to make it macOS compatible. I can see how to do conditional compilation with an #if TargetMacOS etc, but what I can’t figure out is how to deal with External Methods that rely on Windows libraries (like for accessing the Registry), and how not to include them in the MacOS build.

I currently have a WindowsRegistry module, and can’t see how to not include it in the build for MacOS, basically.

Any advice would be appreciated.

2

any calls to items in that module simply need to be wrapped in #if TargetWindows

when you build for OS X since that module wont have any references to it it wont be needed & will be stripped out

3

I thought I did that, but at a higher level than wrapping around the individual external calls. I’ll try again and report back.

4

It may be worth listing the Windows libraries you intend to access here in the forum, in case someone knows a better alternative route.

5

Turns out I was a bit burned out last night and didn’t put my Then keyword at the end of the #If statement. I’m not sure why I thought I could leave off the Then, other than only ever using conditional compilation in C based languages before.

Norman was correct, and I just needed someone to make me double check, as I was only seeing what I wanted to see.

Thanks for the fast replies, got it sorted out now.

David, it’s just a simple Windows Registry module ported over from a VB6 project to read/write values. Seems to all be working OK again now.