Sadly the HISE script editor doesn't color functions or namespaces, even though the code preview option in this forum does color functions.
Would it be possible to add this feature? Or is this something I can do myself?
I've read that this is actually not that easy to do, and there might be real technical limitations, but I don't know for sure how it works.

There's also no HISE extension for Visual Studio Code right?

namespace MyNameSpace
{
	var variable;
}

// --- Target ComboBox ---
// Only testing Filter for now
inline function onTargetBox(component, value)
{
	if (value <= 1) 	 // Disconnect MM_Filter if "None" option is selected
	{MM.connect("LFO Modulator", "MM_Filter", false);}
	
	else if (value == 2) // Connect MM_Filter if "Filter" option is selected	
	{MM.connect("LFO Modulator", "MM_Filter", true);}
}
cmbTarget.setControlCallback(onTargetBox);
MyNameSpace.variable = 1;