reactos/base/applications/calc/htmlhelp.c

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/*
* ReactOS Calc (HtmlHelp support)
*
* Copyright 2007-2017, Carlo Bramini
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "calc.h"
#define GET_CB(name) \
calc_##name = (type_##name)GetProcAddress(hHtmlHelp, #name); \
if (calc_##name == NULL) calc_##name = dummy_##name;
static HWND WINAPI
dummy_HtmlHelpA(HWND hWnd, LPCSTR pszFile, UINT uCommand, DWORD dwData);
static HWND WINAPI
dummy_HtmlHelpW(HWND hWnd, LPCWSTR pszFile, UINT uCommand, DWORD dwData);
type_HtmlHelpA calc_HtmlHelpA = dummy_HtmlHelpA;
type_HtmlHelpW calc_HtmlHelpW = dummy_HtmlHelpW;
static HMODULE hHtmlHelp;
static HWND WINAPI
dummy_HtmlHelpA(HWND hWnd, LPCSTR pszFile, UINT uCommand, DWORD dwData)
{
return NULL;
}
static HWND WINAPI
dummy_HtmlHelpW(HWND hWnd, LPCWSTR pszFile, UINT uCommand, DWORD dwData)
{
return NULL;
}
void HtmlHelp_Start(HINSTANCE hInstance)
{
hHtmlHelp = LoadLibrary(_T("HHCTRL.OCX"));
if (hHtmlHelp == NULL)
return;
GET_CB(HtmlHelpW)
GET_CB(HtmlHelpA)
}
void HtmlHelp_Stop(void)
{
if(hHtmlHelp == NULL)
return;
FreeLibrary(hHtmlHelp);
hHtmlHelp = NULL;
}