The last two parameters are optional, see
https://learn.microsoft.com/en-us/previous-versions/d5fk67ky(v=vs.85)
Test case:
```
' test.vbs
Set objShell = Wscript.CreateObject("Wscript.Shell")
objShell.Run "calc.exe" ' Should work because the arguments are optional
objShell.Run "winver.exe", invalidnumber ' Windows treats this as SW_HIDE because it can convert VT_EMPTY
objShell.Run "notepad.exe", "invalidnumber" ' Windows fails with error
```
There is no need to compile our DLLs as shared libraries since we are
managing symbols exports and imports through spec files.
On my system, this reduces the configure-time by a factor of two.
