remove all components for an installer package from the registry.

componentwhacker.d

module main;

/++
 + whack all compontents for an installed package
 + quick and dirty
 +
 + dub build --build=release --compiler=dmd --arch=x86_64
 +/

import std.stdio, std.string: indexOf;
import std.windows.registry;

void main(string[] args)
{
	version(Windows)
	{
		//HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData
		const 			PID = "659B4F254F646AC4CB6CF8E3D56B5E2D";		// the product-ID.
		int 			i = 0;
		Value 			thisvalue;

		Key registryKey = Registry.localMachine()
		.getKey("Software")
		.getKey("Microsoft")
		.getKey("Windows")
		.getKey("CurrentVersion")
		.getKey("Installer", REGSAM.KEY_ALL_ACCESS)
		.getKey("UserData", REGSAM.KEY_ALL_ACCESS)
		.getKey("S-1-5-18", REGSAM.KEY_ALL_ACCESS)
		.getKey("Components", REGSAM.KEY_ENUMERATE_SUB_KEYS | REGSAM.KEY_ALL_ACCESS);

		foreach(ref Key k; registryKey.keys) {
			try {
				thisvalue = k.getValue(PID);
				if(indexOf(thisvalue.value_SZ, "modo13") > 0) {
					i++;
					writef("Key = %s, Value = %s\n", k.name, thisvalue.value_SZ);
					registryKey.deleteKey(k.name);
				}
			} catch (RegistryException e)
				continue;
		}
		writef("Finished, found %d entries\n", i);
	}
}