Actually add the new files; search for the .chm in ${BASE}/help/ (as req'd by adelikat)

src/drivers/win/help.cpp

@@ -0,0 +1,17 @@
+#include "main.h"
+#include "help.h"
+#include <htmlhelp.h>
+
+void OpenHelpWindow(const char *subpage)
+{
+	char helpFileName[MAX_PATH];
+	strcpy(helpFileName, BaseDirectory);
+	strcat(helpFileName, "\\help\\fceux.chm");
+	if (subpage)
+	{
+		strcat(helpFileName, "::/");
+		strcat(helpFileName, subpage);
+		strcat(helpFileName, ".htm");
+	}
+	HtmlHelp(GetDesktopWindow(), helpFileName, HH_DISPLAY_TOPIC, (DWORD)NULL);
+}

src/drivers/win/help.h

@@ -0,0 +1,2 @@
+// Open a help window to the default topic, or to ::/subpage.htm
+void OpenHelpWindow(const char *subpage = NULL);