midimap: Introduce XP form and prefer it.

dlls/midimap/midimap.c

@@ -36,7 +36,15 @@
 /*
  * Here's how Windows stores the midiOut mapping information.
  *
- * Full form (in HKU) is:
+ * Windows XP form (in HKU) is:
+ *
+ * [Software\\Microsoft\\Windows\\CurrentVersion\\Multimedia\\MIDIMap]
+ * "szPname"="TiMidity port 0"
+ * (incomplete)
+ *
+ * szPname:             name of midiOut device to use.
+ *
+ * If szPname isn't defined, we use Windows 2000 form (also in HKU):
  *
  * [Software\\Microsoft\\Windows\\CurrentVersion\\Multimedia\\MIDIMap] 988836060
  * "AutoScheme"=dword:00000000
@@ -216,6 +224,13 @@ static BOOL	MIDIMAP_LoadSettings(MIDIMAPDATA* mom)
 	DWORD	type, size, out;
 	WCHAR	buffer[256];
 
+	size = sizeof(buffer);
+	if (!RegQueryValueExW(hKey, L"szPname", 0, &type, (void*)buffer, &size))
+	{
+	    ret = MIDIMAP_LoadSettingsDefault(mom, buffer);
+	}
+	else
+	{
 	    ret = 2;
 	    size = sizeof(out);
 	    if (!RegQueryValueExA(hKey, "UseScheme", 0, &type, (void*)&out, &size) && out)
@@ -244,6 +259,7 @@ static BOOL	MIDIMAP_LoadSettings(MIDIMAPDATA* mom)
 		}
 	    }
 	}
+    }
     RegCloseKey(hKey);
 
     if (ret && TRACE_ON(midi))