using Winforms...

[IBIT-ZEE]

Please provide a example of how to access "System.Windows.Forms"

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OS -is- Windows 10 (x86_64-w64-mingw32)
Julia Version 1.6.2 -and- LLVM: libLLVM-11.0.1 (ORCJIT, skylake)
dotnet --version >> 5.0.302
Project.toml [5091b313] DotNET v0.1.2 https://github.com/azurefx/DotNET.jl#master

[azurefx]

Have you installed .NET Desktop Runtime? The desktop runtime contains a .NET Runtime and a bunch of assemblies related to GUI.

If you have a desktop runtime, you need to load them first:

julia> T"System.Reflection.Assembly".LoadFrom(raw"C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\3.1.18\System.Windows.Forms.dll")
System.Reflection.RuntimeAssembly("System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")

julia> Form = T"System.Windows.Forms.Form, System.Windows.Forms"
System.Windows.Forms.Form

julia> myform = Form.new()
System.Windows.Forms.Form("System.Windows.Forms.Form, Text: ")

julia> myform.Text = "Hello, Julia!"
"Hello, Julia!"

julia> myform.ShowDialog()
System.Windows.Forms.DialogResult("Cancel")