Jeremy White wrote:
Do you think it's worth adding the ShowHelpContext
function to the core of Win32-GUI so that there is no dependency on
Win32::OLE? The code is relatively straightforward:
http://search.cpan.org/src/JDB/libwin32-0.24/OLE/OLE.xs
I'd prefer to investigate and support the WinHelp() function from
user32.dll - It's the documented way to do this using the Win32 API. I
will admit to never having used this call.
The API looks like this:
BOOL WinHelp(
HWND hWndMain,
LPCTSTR lpszHelp,
UINT uCommand,
ULONG_PTR dwData
);
For the equivalent of what you were doing:
lpszHelp is a pointer the the path to the help file
uCommand is HELP_CONTEXT
dwData is the context identifier
Much more is possible :-) See MSDN.
Regards,
Rob.
void
_ShowHelpContext(helpfile,context)
char *helpfile
IV context
PPCODE:
{
HWND hwnd;
dPERINTERP;
if (!g_hHHCTRL) {
g_hHHCTRL = LoadLibrary("HHCTRL.OCX");
if (g_hHHCTRL)
g_pfnHtmlHelp = (FNHTMLHELP*)GetProcAddress(g_hHHCTRL,
"HtmlHelpA");
}
if (!g_pfnHtmlHelp) {
warn(MY_VERSION ": HtmlHelp control unavailable");
XSRETURN_EMPTY;
}
// HH_HELP_CONTEXT 0x0F: display mapped numeric value in dwData
hwnd = g_pfnHtmlHelp(GetDesktopWindow(), helpfile, 0x0f,
(DWORD)context);
if (hwnd == 0 && context == 0) // try HH_DISPLAY_TOPIC 0x0
g_pfnHtmlHelp(GetDesktopWindow(), helpfile, 0, (DWORD)context);
}
Cheers,
jez.
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