1 /* 2 * ReactOS Calc (HtmlHelp support) 3 * 4 * Copyright 2007-2017, Carlo Bramini 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #include "calc.h" 22 23 #define GET_CB(name) \ 24 calc_##name = (type_##name)GetProcAddress(hHtmlHelp, #name); \ 25 if (calc_##name == NULL) calc_##name = dummy_##name; 26 27 static HWND WINAPI 28 dummy_HtmlHelpA(HWND hWnd, LPCSTR pszFile, UINT uCommand, DWORD dwData); 29 30 static HWND WINAPI 31 dummy_HtmlHelpW(HWND hWnd, LPCWSTR pszFile, UINT uCommand, DWORD dwData); 32 33 type_HtmlHelpA calc_HtmlHelpA = dummy_HtmlHelpA; 34 type_HtmlHelpW calc_HtmlHelpW = dummy_HtmlHelpW; 35 36 static HMODULE hHtmlHelp; 37 38 static HWND WINAPI 39 dummy_HtmlHelpA(HWND hWnd, LPCSTR pszFile, UINT uCommand, DWORD dwData) 40 { 41 return NULL; 42 } 43 44 static HWND WINAPI 45 dummy_HtmlHelpW(HWND hWnd, LPCWSTR pszFile, UINT uCommand, DWORD dwData) 46 { 47 return NULL; 48 } 49 50 void HtmlHelp_Start(HINSTANCE hInstance) 51 { 52 hHtmlHelp = LoadLibrary(_T("HHCTRL.OCX")); 53 if (hHtmlHelp == NULL) 54 return; 55 56 GET_CB(HtmlHelpW) 57 GET_CB(HtmlHelpA) 58 } 59 60 void HtmlHelp_Stop(void) 61 { 62 if(hHtmlHelp == NULL) 63 return; 64 65 FreeLibrary(hHtmlHelp); 66 hHtmlHelp = NULL; 67 } 68