Finding Default Web Browser

Does anyone know how I can find the default web browser from within a Delphi 2 application ?
The obvious way was to look in the registry for the shell open command for a HTML file, but it doesnt exist in mine :(  so I can't rely on this method.  If I double click an HTML file from explorer though it does launch netscape so the information is stored somewhere.

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Hi Dazz,

If you want to find out the default WEB browser just to open a URL or a specif HTML file, actually you don't need to. Just use the shell procedure to do it, and the result wil be the same as double-clicking in the Explorer.

But if you need to know it for others reasons you can find it in the registry at:



Dazza051197Author Commented:
That key doesnt exist in my registry and neither in my mates registry, so I can't rely on that either.  How does Netscape and/or Internet Explorer know they are not the default browsers ?
Here goes a function that will return the associated EXE file for a given extension:

call GetAssociation('.html') to get the path to NS.

function GetAssociation(Ext:String):string;

var R      : TRegistry;
    s      : string ;

s := '';
if pos('.', Ext) <> 1 then Ext := '.' + Ext;
R := TRegistry.Create;
R.Rootkey := HKey_CLASSES_ROOT;
if R.OpenKey(Ext, false) then
   s := R.ReadString('');
s := s + '\CLSID';
if R.OpenKey(s, false) then
   s := R.ReadString('');
S := 'CLSID\' + s + '\LocalServer32';
if R.OpenKey(s, false) then
   s := R.ReadString('');

GetAssociation := s;


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Dazza051197Author Commented:
Worked on one computer but another one gave lnprocserver32 ???  I used your idea for something else though so I've still given you the points.

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