??????? Delphi does not provide the functionality that directly controls the HM format, but thanks to Robert Chandler to help us convert HTMLHELP.H to Object Pascal format.
??????? But in the process of use, there are some problems, mainly on 2000, XP, and 2003, if the client does not register hhctrl.ocx, there will be access memory errors, and the help file will also Can't open.
??????? In fact, Open HH.PAS, it is easy to find a solution.
??????? In HH.PAS, it works through 3 function pointers, and the function pointer is taken in Modulehhctrl, let's take a look at Modulehhctrl's Way:
Procedure modulehhhctrl;
VAR
OCXFN: String;
Begin
Ocxfn: = getPathtohhctrlocx;
If FileExists (OCXFN) THEN
Begin
HHCTRLHANDLE: = loadingLibrary (Pchar (OCXFN))
IF hhctrlhandle <> 0 THEN
Begin
@HTMLHELPA: = GetProcaddress (hhctrlhandle, 'htmlhelpa');
@HTMLHELPW: = GetProcaddress (hhctrlhandle, 'htmlhelpw');
@HTMLHELP: = GetProcaddress (hhctrlhandle, 'htmlhelpa');
end
END;
END;
This can be seen when the OCXFN does not exist (OCXFN's registration information in the registry in the registry --- Please look at getPathtohhctrlocx, or when LoadLibrary fails!
Ok, then we will change it here. When you get it in the registry, you will directly loadLibrary, after all, hhctrl.ocx exists under the% system%.
But if you really can't get it??? We still want to open help files ... Think, shellexceute, right ... Let the system open.
Therefore, the result of the final revision is as follows:
// MODI BY LIHD 20040823 Modified in the case where Hhctrl.ocx is not registered, when the registry information is not found, first directly LOAD, no longer on Shellexecute
Unit HH;
{
============================================================================================================================================================================================================= =============
Translated from htmlhelp.h by Robert Chandler
Copyright (c) 1999 The Helpware Group
Email: Robertc@helpware.net
Web: http://www.helpware.net
Platform: Delphi 3 / Delphi 4
NOTES:
Htmlhelp.h is distributed with hh workshop
Changes:
18-Feb-1999 ORGINAL VERSION (HH 1.2) 04-APR-1999 Now Uses Loadlibrary to Silently Detect and Load Hhcrtl.ocx
============================================================================================================================================================================================================= =============
}
Interface
Uses Windows, sysutils, registry, shellapi;
{Externals from hhctrl.ocx}
VAR
Hhctrlhandle: thandle = 0; // 0 if hhctrl.ocx could not be loading
Const
hhctrllib = 'hhctrl.ocx';
Var // Function Are Invalid if hhctrlhandle = 0
HTMLHELPA: Function (hwndcaller: hwnd; pszfile: pchar; ucommand: cardinal; dwdata: dword): hWnd; stdcall;
HTMLHELPW: Function (hwndcaller: hwnd; pszfile: pchar; ucommand: cardinal; dwdata: dword): hwnd; stdcall;
HTMLHELP: Function (hwndcaller: hwnd; pszfile: pchar; ucommand: cardinal; dwdata: dword): hwnd; stdcall;
{other exports}
Function getPathtohhctrlocx: String;
{Use the folload for getprocaddress to load from hhctrl.ocx}
Const
Atom_htmlhelp_api_ansi = 14;
Atom_htmlhelp_api_unicode = 15;
{Commands to pass to htmlhelp ()}
Const
HH_DISPLAY_TOPIC = $ 0000; {**}
Hh_help_finder = 0000; // WinHelp Equivalent
Hh_display_toc = $ 0001; // NOT CURRENTLY IMPLEMENTED
HH_DISPLAY_INDEX = $ 0002; // NOT CURRENTLY IMPLEMENTED
Hh_display_search = $ 0003; // NOT CURRENTLY IMPLEMENTED
Hh_set_win_type = $ 0004;
HH_GET_WIN_TYPE = $ 0005;
HH_GET_WIN_HANDLE = $ 0006;
HH_ENUM_INFO_TYPE = $ 0007; // Get Info Type Name, Call Repeatedly to Enumerate, -1 At Endh_set_info_type = $ 0008; // add info type to filter.
Hh_sync = $ 0009;
HH_RESERVED1 = $ 000A;
HH_RESERVED2 = $ 000B;
HH_RESERVED3 = $ 000c;
HH_keyword_lookup = 000d;
HH_DISPLAY_TEXT_POPUP = $ 000E; // Display String Resource ID OR TEXT IN A POPUP Window
HH_HELP_CONTEXT = $ 000f; {**} // Display mapped numeric value in dwdata
HH_TP_HELP_CONTEXTMENU = $ 0010; // Text Popup Help, Same As WinHelp Help_ContextMenu
HH_TP_HELP_WM_HELP = $ 0011; // text popup help, Same as WinHelp Help_WM_HELP
Hh_close_all = 0012; // Close All Windows Opened Directly or Indirectly by The Caller
HH_ALINK_LOOKUP = $ 0013; // alink version of hh_keyword_lookup
HH_GET_LAST_ERROR = $ 0014; // not currently imported // see hherror.h
HH_ENUM_CATEGORY = $ 0015; // get category name, call repeatedly to enumerate, -1 at end
HH_ENUM_CATEGORY_IT = $ 0016; // Get Category Info Type Sermbers, Call Repeatedly To Enumerate, -1 At end
HH_RESET_IT_FILTER = $ 0017; // Clear The INFO TYPE FILTER OF All Info Types.
HH_SET_INCLUSIVE_FILTER = $ 0018; // set inclusive filtering method for untyped Topics to be included in display
HH_SET_EXCLUSIVE_FILTER = $ 0019; // SET Exclusive Filtering Method for untyped Topics to Be Excluded from Display
HH_Initialize = 001c; // Initializes The Help System.
HH_UNINIALIZE = $ 001d; // uninitializes the help system.
HH_PRETRANSLATEMESSAGE = $ 00FD; // pumps messages (NULL, NULL, MSG *).
HH_SET_GLOBAL_PROPERTY = $ 00FC; // set a global protection. (Null, null, hh_gprop) {window profment}
Const
HHWIN_PROP_TAB_AUTOHOHODESHOW = DWORD ($ 00000001); // (1 << 0) Automatically Hide / Show Tri-Pane WINDOW
HHWIN_PROP_ONTOP = DWORD ($ 00000002); // (1 << 1) TOP-MOST WINDOW
HHWIN_PROP_NOTITLEBAR = DWORD ($ 00000004); // (1 << 2) No Title Bar
HHWIN_PROP_NODEF_STYLES = DWORD ($ 00000008); // (1 << 3) No Default Window Styles (ONLY HH_WINTYPE.DWSTYLES)
HHWIN_PROP_NODEF_EXSTYLES = DWORD ($ 00000010); // (1 << 4) No Default Extended Window Styles (ONLY HH_WINTYPE.DWEXSTYLES)
HHWIN_PROP_TRI_PANE = DWORD ($ 00000020); // (1 << 5) Use a tri-pane window
HHWIN_PROP_NOTB_TEXT = DWORD ($ 00000040); // (1 << 6) No Text On Toolbar Buttons
HHWIN_PROP_POST_QUIT = DWORD ($ 00000080); // (1 << 7) Post WM_Quit Message When Window Closes
HHWIN_PROP_AUTO_SYNC = DWORD ($ 00000100); // (1 << 8) Automatical Ssync Contents and Index
HHWIN_PROP_TRACKING = DWORD ($ 00000200); // (1 << 9) Send Tracking Notification Messages
HHWIN_PROP_TAB_SEARCH = DWORD ($ 00000400); // (1 << 10) include Search Tab in Navigation Pane
HHWIN_PROP_TAB_HISTORY = DWORD ($ 00000800); // (1 << 11) Include History Tab in Navigation Pane
HHWIN_PROP_TAB_FAVORITES = DWORD ($ 00001000); // (1 << 12) include Favorites Tab in Navigation Pane
HHWIN_PROP_CHANGE_TITLE = DWORD ($ 00002000); // (1 << 13) Put Current HTML Title In Title Bar
HHWIN_PROP_NAV_ONLY_WIN = DWORD ($ 00004000); // (1 << 14) ONLY DISPLAY THE NAVIGATION WINDOW
HHWIN_PROP_NO_TOOLBAR = DWORD ($ 00008000); // (1 << 15) DON't Display A Toolbarhhwin_Prop_Menu = DWORD ($ 00010000); // (1 << 16) Menu
HHWIN_PROP_TAB_ADVSEARCH = DWORD ($ 00020000); // (1 << 17) Advanced FTS UI.
HHWIN_PROP_USER_POS = DWORD ($ 00040000); // (1 << 18) After Initial Creation, User Controls Window Size / Position
HHWIN_PROP_TAB_CUSTOM1 = DWORD ($ 00080000); // (1 << 19) UsesE Custom Tab # 1
HHWIN_PROP_TAB_CUSTOM2 = DWORD ($ 00100000); // (1 << 20) Uses Custom Tab # 2
HHWIN_PROP_TAB_CUSTOM3 = DWORD ($ 00200000); // (1 << 21) UsesE Custom Tab # 3
HHWIN_PROP_TAB_CUSTOM4 = DWORD ($ 00400000); // (1 << 22) Use Custom Tab # 4
HHWIN_PROP_TAB_CUSTOM5 = DWORD ($ 00800000); // (1 << 23) Use Custom Tab # 5
HHWIN_PROP_TAB_CUSTOM6 = DWORD ($ 01000000); // (1 << 24) Use Custom Tab # 6
HHWIN_PROP_TAB_CUSTOM7 = DWORD ($ 02000000); // (1 << 25) Uses Custom Tab # 7
HHWIN_PROP_TAB_CUSTOM8 = DWORD ($ 04000000); // (1 << 26) Use Custom Tab # 8
HHWIN_PROP_TAB_CUSTOM9 = DWORD ($ 08000000); // (1 << 27) Use Custom Tab # 9
HHWIN_TB_MARGIN = DWORD ($ 10000000); // (1 << 28) The Window Type Has A Margin
{window parameters}
Const
HHWIN_PARAM_PROPERTIES = DWORD ($ 00000002); // (1 << 1) Valid FswinProperties
HHWIN_PARAM_STYLES = DWORD ($ 00000004); // (1 << 2) Valid DWStyles
HHWIN_PARAM_EXSTYLES = DWORD ($ 00000008); // (1 << 3) Valid DwexStyles
HHWIN_PARAM_RECT = DWORD ($ 00000010); // (1 << 4) Valid RcWindowPOS
HHWIN_PARAM_NAV_WIDTH = DWORD ($ 00000020); // (1 << 5) Valid INAVWIDTHHWIN_PARAM_SHOWSTATE = DWORD ($ 00000040); // (1 << 6) Valid nShowState
HHWIN_PARAM_INFOTYPES = DWORD ($ 00000080); // (1 << 7) Valid Apinfotypes
HHWIN_PARAM_TB_FLAGS = DWORD ($ 00000100); // (1 << 8) Valid Fstoolbarflags
HHWIN_PARAM_EXPANSION = DWORD ($ 00000200); // (1 << 9) Valid Fnotexpanded
HHWIN_PARAM_TABPOS = DWORD ($ 00000400); // (1 << 10) Valid TabPOS
HHWIN_PARAM_TABORDER = DWORD ($ 00000800); // (1 << 11) Valid Taborder
HHWIN_PARAM_HISTORY_COUNT = DWORD ($ 00001000); // (1 << 12) Valid Chistory
HHWIN_PARAM_CUR_TAB = DWORD ($ 00002000); // (1 << 13) Valid CurnavType
{Button Constants}
Const
HHWIN_BUTTON_EXPAND = DWORD ($ 00000002); // (1 << 1) Expand / Contract Button
HHWIN_BATTON_BACK = DWORD ($ 00000004); // (1 << 2) Back Button
HHWIN_BUTTON_FORWARD = DWORD ($ 00000008); // (1 << 3) Forward Button
HHWIN_BUTTON_STOP = DWORD ($ 00000010); // (1 << 4) Stop Button
HHWIN_BUTTON_REFRESH = DWORD ($ 00000020); // (1 << 5) Refresh Button
HHWIN_BUTTON_HOME = DWORD ($ 00000040); // (1 << 6) Home Button
HHWIN_BUTTON_BROWSE_FWD = DWORD ($ 00000080); // (1 << 7) Not Implement
HHWIN_BUTTON_BROWSE_BCK = DWORD ($ 00000100); // (1 << 8) Not IMplement
HHWIN_BUTTON_NOTES = DWORD ($ 00000200); // (1 << 9) Not IMplement
HHWIN_BUTTON_CONTENTS = DWORD ($ 00000400); // (1 << 10) Not IMplement
HHWIN_BUTTON_SYNC = DWORD ($ 00000800); // (1 << 11) Sync Buttonhhwin_Button_Options = DWORD ($ 00001000); // (1 << 12) Options Button
HHWIN_BUTTON_PRINT = DWORD ($ 00002000); // (1 << 13) Print Button
HHWIN_BUTTON_INDEX = DWORD ($ 00004000); // (1 << 14) Not IMplement
HHWIN_BUTTON_SEARCH = DWORD ($ 00008000); // (1 << 15) Not IMplement
HHWIN_BUTTON_HISTORY = DWORD ($ 00010000); // (1 << 16) Not IMPLEMENTED
HHWIN_BUTTON_FAVORITES = DWORD ($ 00020000); // (1 << 17) Not IMplement
HHWIN_BUTTON_JUMP1 = DWORD ($ 00040000); // (1 << 18)
HHWIN_BUTTON_JUMP2 = DWORD ($ 00080000); // (1 << 19)
HHWIN_BUTTON_ZOOM = DWORD ($ 00100000); // (1 << 20)
HHWIN_BUTTON_TOC_NEXT = DWORD ($ 00200000); // (1 << 21)
HHWIN_BUTTON_TOC_PREV = DWORD ($ 00400000); // (1 << 22)
HHWIN_DEF_BUTTONS = (hhwin_button_expand
OR hhwin_button_back
OR hhwin_button_options
Or hhwin_button_print);
{Button IDS}
Const
IDTB_EXPAND = 200;
IDTB_CONTRACT = 201;
IDTB_STOP = 202;
IDTB_REFRESH = 203;
IDTB_BACK = 204;
IDTB_HOME = 205;
IDTB_SYNC = 206;
IDTB_PRINT = 207;
IDTB_OPTIONS = 208;
IDTB_FORWARD = 209;
IDTB_NOTES = 210; // Not Implement
IDTB_BROWSE_FWD = 211;
IDTB_BROWSE_BACK = 212;
IDTB_CONTENTS = 213; // Not Implement
IDTB_INDEX = 214; // Not Implement
IDTB_SEARCH = 215; // not implementidtb_history = 216; // not imported
IDTB_FAVORITES = 217; // Not Implement
IDTB_JUMP1 = 218;
IDTB_JUMP2 = 219;
IDTB_CUSTOMIZE = 221;
IDTB_ZOOM = 222;
IDTB_TOC_NEXT = 223;
IDTB_TOC_PREV = 224;
{NOTIFICATION CODES}
Const
HHN_FIRST = (0-860);
HHN_LAST = (0-879);
HHN_NAVCOMPLETE = (HHN_FIRST-0);
HHN_TRACK = (HHN_FIRST-1);
HHN_WINDOW_CREATE = (HHN_FIRST-2);
Type
HHN_NOTIFY = Packed Record // TAGHHN_NOTIFY
HDR: TNMHDR;
Pszurl: pwidechar; // pcstr: multi-byte, null-terminated string
END;
HH_POPUP = Packed Record // TAGHH_POPUP
CBSTRUCT: INTEGER; // Sizeof this Structure
Hinst: Hinst; // Instance Handle for String Resource
IDString: cardinal; // String Resource ID, or text id if pszfile is specified in Htmlhelp Call
PSZText: pchar; // used if idstring is Zero
PT: tpoint; // Top Center of Popup Window
CLRFOREGROUND: colorref; // use -1 for default
CLRBACKGROUND: colorRef; // use -1 for default
RcMargins: TRECT; // Amount of Space Between Edges of window and text, -1 for Each Member to ignore
PSZFONT: PCHAR; // Facename, Point Size, Char Set, Bold Italic Underline
END;
Hh_aklink = packed record // taghh_aklink
CBSTRUCT: INTEGER; // Sizeof this Structure
FRESERVED: BOOL; // Must Be false (really!)
PszkeyWords: pchar; // semi-colon Separated Keywords
Pszurl: pchar; // url to jump to if no keywords found (may be null) pszmsgtext: pchar; // message text to display in MessageBox if pszurl is null and no keyword match
Pszmsgtitle: Pchar; // Message Text to Display In Messagebox if Pszurl Is Null and no keyword match
Pszwindow: pchar; // window to display url in
FINDEXONFAIL: BOOL; // Displays Index if Keyword Lookup Fails.
END;
Type
Phhwin_navtype = ^ twhwin_navtype;
ThHWIN_NAVTYPE = INTEGER;
Const
HHWIN_NAVTYPE_TOC = 0;
HHWIN_NAVTYPE_INDEX = 1;
HHWIN_NAVTYPE_SEARCH = 2;
HHWIN_NAVTYPE_FAVORITES = 3;
HHWIN_NAVTYPE_HISTORY = 4; // Not Implement
HHWIN_NAVTYPE_AUTHOR = 5;
HHWIN_NAVTYPE_CUSTOM_FIRST = 11;
Type
HH_ITYPE =
IT_INCLUSIVE,
IT_EXCLUSIVE,
IT_HIDDEN);
TAGHH_ENUM_IT = PACKED RECORD / / TAGHH_ENUM_IT, HH_ENUM_IT, * PhH_ENUM_IT
CBSTRUCT: Integer; // Size of this Structure
ITYPE: INTEGER; // The Type of the Information Type IE. Inclusive, Exclusive, or Hidden
Pszcatname: pansichar; // set to the name of the category to enumerate; Else Null
Pszitname: Pansichar; // Volitile Pointer to the name of the infintpe. allocated by call. Caller resposssible for Freeing
Pszitdescription: Pansichar; // Volitile Pointer to the description of the infint.
END;
ThhenumInfotype = taghh_enum_it;
PhhenumInfotype = ^ thhenumInfotype;
Type
TAGHH_ENUM_CAT = Packed Record // TAGHH_ENUM_CAT, HH_ENUM_CAT, * PhH_ENUM_CAT
CBSTRUCT: Integer; // Size of this Structure
Pszcatname: PanscatName: Pansichar; // Volitile Pointer to the category namepszcatdescription: Pansichar; // Volitile Pointer to Category Description
END;
Thhenumcat = taghh_enum_cat;
Phhenumcat = ^ thhenumcat;
Type
TAGHH_SET_INFOTYPE = Packed RECORD // TAGHH_SET_INFOTYPE, HH_SET_INFOTYPE, * Phh_set_infotype
CBSTRUCT: Integer; // the size of this structure
.. // the name of the category, if any, the infintpe is a member of.
Pszinfotypename: Pansichar; // the name of the info type to add to the filter
END;
ThHSetInfotype = tagh_set_infotype;
Phhsetinfotype = ^ thrhsetinfotype;
Type
HH_INFOTYPE = DWORD;
Thhinfotype = HH_INFOTYPE;
Phhinfotype = ^ thhinfotype; // phh_infotype
Type
ThHWINNAVTABS =
HHWIN_NAVTAB_TOP,
HHWIN_NAVTAB_LEFT,
HHWIN_NAVTAB_BOTTOM
);
Const
HH_max_tabs = 19; // maximum number of tabs
Const
HH_TAB_CONTENTS = 0;
HH_TAB_INDEX = 1;
HH_TAB_SEARCH = 2;
HH_TAB_FAVORITES = 3;
HH_TAB_HISTORY = 4;
HH_TAB_AUTHOR = 5;
HH_TAB_CUSTOM_FIRST = 11;
HH_TAB_CUSTOM_LAST = HH_MAX_TABS;
HH_MAX_TABS_CUSTOM = (hh_tab_custom_last - hh_tab_custom_first 1);
{HH_DISPLAY_SEARCH Command Related Structures and constants}
Const
HH_FTS_DEFAULT_PROXIMITY = (-1);
Type
TAGHH_FTS_QUERY = PACKED RECORD // TAGHH_FTS_QUERY, HH_FTS_QUERY
CBSTRUCT: Integer; // sizeof structure in bytes.
FunicodeStrings: Bool; // True IF All strings are unicode.
PSZSearchQuery: pchar; // string containing the search query.
iProxImity: longint; // Word proximity.fstemmedsearch: Bool; // True for StemmedSearch ONLY.
FtitleOnly: Bool; // True for Title Search Only.
FEXECUTE: BOOL; / / TRUE TO INITIATE The Search.
Pszwindow: pchar; // window to display in
END;
HH_FTS_QUERY = tagh_fts_query;
{Hh_wintype structure}
Type
TAGHH_WINTYPE = Packed Record // TAGHH_WINTYPE, HH_WINTYPE, * PhH_WINTYPE
CBSTRUCT: Integer; // in: Size of this Structure Including all information type Types. INCLUDING All INFORMATION TYPES
Funicodestrings: Bool; // In / Out: True IF All Strings Are IN Unicode
PSZTYPE: PCHAR; // IN / OUT: NAME OF A TYPE OF WINDOW
fsvalidmembers: dword; // in: bit flag of valid members (hhwin_param_)
FswinProperties: dword; // in / out: Properties / Attributes of the window (hhwin_)
PSZCAPTION: PCHAR; // In / Out: Window Title
DWStyles: dWord; // in / out: window styles
DWEXSTYLES: DWORD; // IN / OUT: Extended Window Styles
RcWindowPos: TRECT; // IN: Starting Position, Out: Current position
NSHOWSTATE: Inteder; // in: Show State (E.g., sw_show)
HWndHelp: hwnd; // out: Window Handle
HWndCaller: hwnd; // out: WHO Called this window
Painfotypes: phhinfotype; // in: Pointer to an Array of Information Types
{THE FOLLOWING MEMBERS Are ONLY VALID IF HHWIN_PROP_TRI_PANE IS Set}
HWNDTOOLBAR: HWND; // Out: Toolbar Window In Tri-Pane WINDOW
HWndNavigation: hwnd; // out: navigation window in tri-pane window
HWNDHTML: HWND; // Out: Window Displaying HTML in Tri-Pane WINDOW
INAVWIDTH: INTEGER; // IN / OUT: Width of navigation windowrchtml: TRECT; / / OUT: HTML Window Coordinates
PSZTOC: PCHAR; // in: location of the table of contents file
Pszindex: pchar; // in: location of the index file
Pszfile: pchar; // in: Default location of the html file
Pszhome: Pchar; // In / Out: html file to display des copy
FSTOOLBARFLAGS: DWORD; // in: Flags Controling The Appearance of the Toolbar
FNOTEXPANDED: BOOL; // in: True / false to Contract or Expand, Out: Current State
CurnavType: Integer; // In / Out: ui to display in the Navigational Pane
TabPos: Integer; // IN / OUT: hhwin_navtab_top, hhwin_navtab_left, or hhwin_navtab_bottom
IDNOTIFY: INTEGER; // IN: ID to use for wm_notify messages
Taborder: Packed Array [0..h_max_tabs] of byte; // in / out: Tab ORDER: Contents, Index, Search, History, Favorites, Reserved 1-5, Custom Tabs
Chistory: Integer; // In / out: Number of History Items to Keep (Default IS 30)
PSZJUMP1: PCHAR; // text for hhwin_button_jump1
PSZJUMP2: PCHAR; // text for hhwin_button_jump2
PSZURLJUMP1: PCHAR; // Url for hhwin_button_jump1
PSZURLJUMP2: PCHAR; // Url for hhwin_button_jump2
Rcminsize: TRECT; // minimum size for WINDOW (Ignored in Version 1)
Cbinfotypes: integer; // size of painfotypes;
Pszcustomtabs: Pchar; // Multiple Zero-Terminated strings
END;
Hh_wintype = taghh_wintype;
ThHWINTYPE = HH_WINTYPE;
Phhwintype = ^ thrhwintype;
Type
HHACT =
HHACT_TAB_CONTENTS, HHACT_TAB_INDEX,
HHACT_TAB_SEARCH,
HHACT_TAB_HISTORY,
HHACT_TAB_FAVORITES,
HHACT_EXPAND,
HHACT_CONTRACT,
HHACT_BACK,
HHACT_FORWARD,
HHACT_STOP,
HHACT_REFRESH,
HHACT_HOME,
HHACT_SYNC,
HHACT_OPTIONS,
HHACT_PRINT,
HHACT_HIGHLIGHT,
HHACT_CUSTOMIZE,
HHACT_JUMP1,
HHACT_JUMP2,
HHACT_ZOOM,
HHACT_TOC_NEXT,
HHACT_TOC_PREV,
HHACT_NOTES,
HHACT_LAST_ENUM);
Type
TAGHHHNTRACK = Packed Record // TAGHHHTRACK, HHNTRACK
HDR: TNMHDR;
Pszcururl: pwidechar; // multi-byte, null-terminated string !! pwidechar; // pcstr: multi-byte, Nul-Terminated String
iDAdition: integer; // hhact_ value
Phhwintype: phhwintype; // Current Window Type Structure
END;
HHNTRACK = taghhntrack;
///
//
// Global Control Properties.
//
Type
TAGHH_GPROPID = INTEGER; // taghh_gpropid, hh_gpropid
HH_GPROPID = tagh_gpropid;
Const
HH_GPROPID_SINGLETHREAD = 1; // Variant_Bool: True for Single Thread
HH_GPROPID_TOOLBAR_MARGIN = 2; // long: provides a left / right margin around the toolbar.
HH_GPROPID_UI_LANGUAGE = 3; // long: langid of the ui.
HH_GPROPID_CURRENT_SUBSET = 4; // BStr: Current Subset.
HH_GPROPID_CONTENT_LANGUAGE = 5; // long: landid for design.
///
//
// Global Property Structure
//
Type
TAGHH_GLOBAL_PROPERTY = PACKED RECORD / / TAGHHH_GLOBAL_PROPERTY, HH_GLOBAL_PROPERTY
ID: hh_gpropid;
Variant;
END;
HH_GLOBAL_PROPERTY = taghh_global_property;
IMPLEMENTATION
Const hhpathregkey = 'CLSID / {ADB880A6-D8FF-11CF-9377-00AA003B7A11} / inprocserver32'; {
Returns Full Path to hhctrl.ocx. Returns Empty String if File or Registry Entry Not Found
Note: hhctrl.ocx may not be in the path. Consider the case where
The Ocx Has Been Downloaded to The Windows Ocx Cache Via The Net.
So .. Best to get the path from the registry
}
Function getPathtohhctrlocx: String;
Var rg: Tregistry;
Begin
Result: = ''; // Default Return
Rg: = tregistry.create;
Rg.RootKey: = HKEY_CLASSES_ROOT;
IF rg.keyexists (hhpathregkey) and rg.openkey (HhpathRegkey, false) THEN
Begin
Result: = rg.readstring (''); // Default Value
Rg.closekey;
IF (Result <> ') and (not fileexists (result)) THEN / FINAL Check - File Must EXIST
Result: = '';
END;
Rg.free;
END;
// Add by LiHD 20040823 As the final entrance, it is provided to HTMLHELP a certain exit to prevent memory access errors.
Function DSHTMLHELP (HWNDCALLER: HWND; PSZFILE: PCHAR; UCommand: cardinal; dwdata: dword): hwd; stdcall;
Begin
Shellapi.SHellexecute (HWndcaller, 'Open', PSZFILE, '', '', SW_NORMAL);
END;
Procedure modulehhhctrl;
VAR OCXFN: String;
Begin
Ocxfn: = getPathtohhctrlocx;
If FileExists (OCXFN) THEN
HHCTRLHANDLE: = loadingLibrary (Pchar (OCXFN))
// add by lihd 20040823
Else
Hhctrlhandle: = loadingLibrary (pchar (hhctrllib));
IF hhctrlhandle <> 0 THEN
Begin
@HTMLHELPA: = GetProcaddress (hhctrlhandle, 'htmlhelpa');
@HTMLHELPW: = GetProcaddress (hhctrlhandle, 'htmlhelpw');
@HTMLHELP: = GetProcaddress (hhctrlhandle, 'htmlhelpa');
end
Else // Add by Lihd 20040823 Take default shellexeccute
Begin
@HTMLHELPA: = @dshtmlhelp;
@HTMLHELPW: = @dshtmlhelp; @htmlhelp: = @dshtmlhelp;
END;
END;
INITIALIZATION
Modulehhctrl;
Finalization
IF hhctrlhandle <> 0 THEN
Freelibrary (hhctrlhandle);
End.
Of course, the best way is to bring a hhctrl.ocx when the software is distributed, and register ... Hehe ...
