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Can A Windows Dll Retrieve Its Own Filename?

- 1 answer

A Windows process created from an exe file has access to the command string which invoked it, including its file's 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 function loaded via 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.

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Answer

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;

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

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source: stackoverflow.com
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