调用htmlhelp文件(*.chm)

function HtmlHelpA(hwndcaller:Longint;lpHelpFile:string;uCommand:Longint;dwData:string):HWND;stdcall;external 'hhctrl.ocx'

例句:
HtmlHelpA(self.handle,ExtractFilePath(Application.ExeName)+'pbtool.chm',0,'gaishu.html');