Getting a installed progrm list on windows.

1. Registry
   • I implemented the logic using this way. It works well almost, but the result of this logic is different from the Windows's.
• Finding all installed programs from the registry
2. appwiz.cpl

• How to list all installed programs of my xp?
• appwiz.cpl is actually the COM server, so we can use interfaces of it. However, I guess this functionality is undocumented.
• How to list installed programs using IShellAppManamger