How to tell whether explorer is hiding extensions for known file types ?.

[Atom]

Hi, Can anyone supply sample code that can get/set the state of the "Hide extensions for known file types" check box, which is in control panel "Folder Options". Many thanks.

[David Crow]

Check out HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced in the registry.

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"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

[Atom]

Thanks David your advice was very helpful. Although it hasn't entirely solved my problem, which is in code similar to this. CFileDialog D; if( D.DoModal() == IDOK ) { CString strFPN = D.GetFileName(); CString strExt = D.GetFileExt(); CString strFPNandExt = strFPN + strExt; // Do stuff here with strFPNandExt... } My problem is that when explorer is hiding file extensions, CFileDialog::GetFileExt() returns a null string. So what I really need to know is whether there is a way to get the file extension of a file that is selected in CFileDialog, (or maybe anywhere in the shell) when file extensions are hidden. I don't really want to have a registry value changed and then restored when CFileDialog::DoModal() has finished its business.

[David Crow]

Atom wrote:

So what I really need to know is whether there is a way to get the file extension of a file that is selected in CFileDialog, (or maybe anywhere in the shell) when file extensions are hidden.

See here.

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"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

[Atom]

Superb, just what I need. Many thanks.:)