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Replicate r7285 from PuTTY: make keyboard input work in HTML Help.

[originally from svn r7286]
[r7285 == 3d78bf9b261b4bfd30ae00d5ba43744c4144c934 in putty repository]

--- a/windows.c

+++ b/windows.c

@@ -44,7 +44,6 @@

 #ifndef NO_HTMLHELP

 typedef HWND (CALLBACK *htmlhelp_t)(HWND, LPCSTR, UINT, DWORD);

-static DWORD html_help_cookie;

 static htmlhelp_t htmlhelp;

 static HINSTANCE hh_dll;

 #endif /* NO_HTMLHELP */

@@ -1033,7 +1032,6 @@

 		FreeLibrary(hh_dll);

 	}

 	if (htmlhelp) {

-	    htmlhelp(NULL, NULL, HH_INITIALIZE, (DWORD)&html_help_cookie);

 	    help_path = dupstr(b);

 	    help_type = CHM;

 	    help_topic = thegame.htmlhelp_topic;

@@ -1144,12 +1142,9 @@

  */

 static void cleanup_help(void)

 {

-#ifndef NO_HTMLHELP

-    if (help_type == CHM) {

-	assert(htmlhelp);

-	htmlhelp(NULL, NULL, HH_UNINITIALIZE, html_help_cookie);

-    }

-#endif /* NO_HTMLHELP */

+    /* Nothing to do currently.

+     * (If we were running HTML Help single-threaded, this is where we'd

+     * call HH_UNINITIALIZE.) */

 }

 static void check_window_size(frontend *fe, int *px, int *py)