Can a windows dll retrieve its own filename?

Question

So a windows exe file has access to the command string which invoked it, including its path and filename. eg. "C:\MyApp\MyApp.exe --help".

But this is not so for a dll invoked via LoadLibrary. Does anyone know of a way for a dll to find out what its path and filename is?

Specifically I'm interested in a Delphi solution, but I suspect that the answer would be pretty much the same for any language.

Answer 1

I think you're looking for GetModuleFileName.

http://www.swissdelphicenter.ch/torry/showcode.php?id=143:

{
  If you are working on a DLL and are interested in the filename of the
  DLL rather than the filename of the application, then you can use this function:
}

function GetModuleName: string;
var
  szFileName: array[0..MAX_PATH] of Char;
begin
  FillChar(szFileName, SizeOf(szFileName), #0);
  GetModuleFileName(hInstance, szFileName, MAX_PATH);
  Result := szFileName;
end;

Also, look at http://delphi.newswhat.com/geoxml/forumhistorythread?groupname=borland.public.delphi.internet.isapi-webbroker&[email protected] which contains pretty much the same code but some additional information that may or may not be useful.

Untested though, been some time since I worked with Delphi :)