LoadLibrary on OCX file fails in Windows 7 x64

Question

I need to open a html help file from within a legacy windows application written in old version of C++ Builder. HtmlHelp is loaded via HtmlHelp.ocx, which I am loading via LoadL

Answer 1

Use ExpandEnvironmentStrings function to expand %SystemRoot%\System32\hhctrl.ocx to real path on user's intallation. 64bit OS will redirect expanded path to 32bit dll correctly.