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6098 pd 1 
/*
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Can be built with VC++6 by
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cl /MT /Ox /c Rchtml.c
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link /dll /out:Rchtml.dll Rchtml.obj user32.lib htmlhelp.lib advapi32.lib
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*/
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#define WIN32_LEAN_AND_MEAN 1
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#include <windows.h>
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#include <htmlhelp.h>
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static char htmlref[256];
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__declspec(dllexport) void Rchtml(char **file, char **ptopic, int *error)
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{
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    char *topic =*ptopic;
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    HWND rc;
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    strcpy(htmlref, *file);
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    if(topic && strlen(topic)) {
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	strcat(htmlref, "::/");
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	strcat(htmlref, topic);
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	strcat(htmlref, ".html");
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    }
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    rc = HtmlHelp(GetDesktopWindow(), htmlref, HH_DISPLAY_TOPIC, 0);
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    *error = (rc == (HWND)NULL);
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}