Wrong processing of shell's Unknown file type

[MVV]

There is an association for all unregistered file types in a registry:

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HKEY_CLASSES_ROOT\Unknown\shell

If I add open action or edit openas one, I can change default action on Enter for unregistered file types in Explorer. However such association doesn't work in TC - it shows 'Open with' dialog anyway.

Test:
1. Open regedit and go to mentioned key.
2. Export it to reg file (backup copy).
3. Add/edit subkeys open\command and openas\command and change default parameter value to e.g. notepad.exe "%1".
4. Do dblclick or Enter on any unregistered file type in Explorer to be sure it works in it - it should open file in a notepad.
5. Do dblclick or Enter on same file in TC. Notice different behaviour.
6. Delete above mentioned key and execute saved [at the step 2] reg file to restore its previous state.

Tested with TC8rc1[x32/x64] and TC7.04a @ Win7x64Ult.

[ghisler(Author)]

"Unknown" isn't currently supported by TC, and I will not add it just when the final release is near, sorry. Currently TC calls rundll32.exe with parameter
OpenAs_RunDLL filename

when there is a file with no association. It seems that OpenAs_RunDLL doesn't use the above key. There doesn't seem to be a standard method to use this key, so everything would have to be done manually. This could get really difficult with things like DDE or shell extensions.

[MVV]

Does OpenAs_RunDLL works better than simple ShellExecute?

[ghisler(Author)]

I haven't tested ShellExecute or ShellExecuteEx with files not having any association.

[MVV]

Just tested it now, ShellExecute works just like Enter in Explorer (executes action from Unknown key or shows Open with dialog).

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ShellExecute(0, 0, L"D:\\TEMP\\1.txt", 0, 0, SW_SHOWDEFAULT);
ShellExecute(0, 0, L"D:\\TEMP\\1.bla", 0, 0, SW_SHOWDEFAULT);

So ShellExecuteEx should work in same way.

[ghisler(Author)]

I will consider it for TC 8.1. I have different code for NT-based Windows and 9x-based Windows in TC, so it's not wise to change that now.