Display more informative message when HtmlHelp stub is invoked, add

dlls/hhctrl.ocx/Makefile.in

@@ -3,7 +3,7 @@ TOPOBJDIR = ../..
 SRCDIR    = @srcdir@
 VPATH     = @srcdir@
 MODULE    = hhctrl.ocx
-IMPORTS   = shell32
+IMPORTS   = shell32 user32 kernel32
 
 C_SRCS = hhctrl.c
 

dlls/hhctrl.ocx/hhctrl.c

@@ -23,21 +23,35 @@
 #include "windef.h"
 #include "winbase.h"
 #include "wingdi.h"
+#include "winnls.h"
 #include "winuser.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
 
-HWND WINAPI HtmlHelpA(HWND hwndCaller, LPCSTR pszFile,
-  UINT uCommand, DWORD dwData)
+HWND WINAPI HtmlHelpW(HWND caller, LPCWSTR filename, UINT command, DWORD data)
 {
-	FIXME("stub\n");
-	return 0;
+    FIXME("(%p, %s, %d, %ld): stub\n", caller, debugstr_w(filename), command, data);
+
+    /* if command is HH_DISPLAY_TOPIC just display an informative message for now */
+    if (command == 0)
+        MessageBoxA( NULL, "HTML Help functionality is currently unimplemented.\n\n"
+                     "Try installing Internet Explorer, or using a native hhctrl.ocx with the Mozilla ActiveX control.",
+                     "Wine", MB_OK | MB_ICONEXCLAMATION );
+    return 0;
 }
 
-HWND WINAPI HtmlHelpW(HWND hwndCaller, LPCWSTR pszFile,
-  UINT uCommand, DWORD dwData)
+HWND WINAPI HtmlHelpA(HWND caller, LPCSTR filename, UINT command, DWORD data)
 {
-	FIXME("stub\n");
-	return 0;
+    WCHAR *wfile = NULL;
+    DWORD len = MultiByteToWideChar( CP_ACP, 0, filename, -1, NULL, 0 );
+    HWND result;
+
+    wfile = HeapAlloc( GetProcessHeap(), 0, len );
+    MultiByteToWideChar( CP_ACP, 0, filename, -1, wfile, len );
+
+    result = HtmlHelpW( caller, wfile, command, data );
+
+    HeapFree( GetProcessHeap(), 0, wfile );
+    return result;
 }