CLSID_FileOpenDialog where is it in the registry? Is it comdlg32? ICommDlgBrowser? CIDopen? or something else?

Question

I would like to create a custom common item dialog (CID) and then register my custom COM:

But I am confused about the CID COM object. I want to see the existing COM object before I make a custom one.

I found comdlg32 in the registry but I think that is the legacy (pre-Vista) dialog.
HKEY_CLASSES_ROOT\CLSID{725F645B-EAED-4fc5-B1C5-D9AD0ACCBA5E}\InProcServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID{725F645B-EAED-4fc5-B1C5-D9AD0ACCBA5E}\InProcServer32

I found ICommDlgBrowser but that's an interface, not a COM?
HKEY_CLASSES_ROOT\Interface{000214F1-0000-0000-C000-000000000046}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface{000214F1-0000-0000-C000-000000000046}

I thought the new one is CIDOpen, but I can't find a CLSID in the registry, rather this is what I find:
HKEY_USERS\S-1-5-21-1285309903-269343738-3178715341-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\CIDOpen

This is the documentation for customization: https://learn.microsoft.com/en-us/windows/win32/shell/common-file-dialog but my question is about finding the CID COM object in the registry.

Answer 1

Hello @ellieorange ,
Welcome to Microsoft Q&A!

CLSID_FileOpenDialog at this location (File Open Dialog) in the registry.

Computer\HKEY_CLASSES_ROOT\CLSID\{DC1C5A9C-E88A-4dde-A5A1-60F82A20AEF7}  

You can see CLSID_FileOpenDialog in <ShObjIdl_core.h>

EXTERN_C const CLSID CLSID_FileOpenDialog;  
  
#ifdef __cplusplus  
  
class DECLSPEC_UUID("DC1C5A9C-E88A-4dde-A5A1-60F82A20AEF7")  
FileOpenDialog;  
  
#endif  

Thank you.
Junjie

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