Using Precompiled .NET Assembly DLL in Mono?

Question

We\'re currently testing Mono to see if our .NET DLLs will work for customers on Linux. Our DLLs provide components for Windows Forms. I placed the DLLs in the Debug direc

Answer 1

uxtheme.dll is the Windows theme engine, if I'm not mistaken. It's quite natural you don't have that in a non-Windows environment, so P/Invoking its exported functions is not directly possible.

You have two options here:

1. Open up that OnHandleCreated method and replace the SetWindowTheme call with something portable or
2. Create a dummy libuxtheme.so that contains just this one function so mono can P/Invoke it.

I recommend the first approach if possible, as you'd need to create that dummy libuxtheme.so for every platform you're supporting. I.e., you'd have to make a libuxtheme.so for x86 Linux, a libuxtheme.so for x86_64 Linux, the same for FreeBSD, a libuxtheme.dylib for Mac OS X and so on.

If OnHandleCreated was generated by some UI designer or the like, you probably have to remove some widget themes the get rid of the call.