Delphi

Question:
Please teach me how to associate extention file to our application?

Answer:
Implementation have to override information inside registry.
Anyway, you can follow example below.


uses
registry, shlobj;

procedure TForm1.RegisterFileType(prefix: string; exepfad: string);
var
reg: TRegistry;
begin
reg := TRegistry.Create;
try
reg.RootKey := HKEY_CLASSES_ROOT;
reg.OpenKey('.' + prefix, True);
try
reg.Writestring('', prefix + 'file');
finally
reg.CloseKey;
end;
reg.CreateKey(prefix + 'file');
reg.OpenKey(prefix + 'file\DefaultIcon', True);
try
reg.Writestring('', exepfad + ',0');
finally
reg.CloseKey;
end;
reg.OpenKey(prefix + 'file\shell\open\command', True);
try
reg.Writestring('', exepfad + ' "%1"');
finally
reg.CloseKey;
end;
finally
reg.Free;
end;
SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nil, nil);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
RegisterFileType('pci', 'c:\file.exe');
end;