Added GetDefaultSaveDir(suffix) which fetches the default "Application

Data" path for the current user from the registry, appends the suffix,
creates the subdirectory if it doesn't exist, then returns a string from
the heap.
This path is the new default "savedir" location on Windows. Tested on
98/2K/XP.
Changed code that sets the pwd to the directory containing the executable.
Originally for BEOS only, now working and enabled for Windows also.

src/win32_print.c

@@ -24,6 +24,7 @@
 /*                - prints using 24-bit (not 32-bit) bitmap */
 
 #include <windows.h>
+#include <direct.h>
 #include "SDL_syswm.h"
 #include "win32_print.h"
 
@@ -470,3 +471,65 @@ error:
 
   return res;
 }
+
+/*
+  Read access to Windows Registry
+*/
+static HRESULT ReadRegistry(const char *key, const char *option, char *value, int size)
+{
+  LONG	res;
+  HKEY	hKey = NULL;
+
+  res = RegOpenKeyEx(HKEY_CURRENT_USER, key, 0, KEY_READ, &hKey);
+  if (res != ERROR_SUCCESS)
+    goto err_exit;
+  res = RegQueryValueEx(hKey, option, NULL, NULL, (LPBYTE)value, (LPDWORD)&size);
+  if (res != ERROR_SUCCESS)
+    goto err_exit;
+  res = ERROR_SUCCESS;
+
+err_exit:
+  if (hKey) RegCloseKey(hKey);
+  return HRESULT_FROM_WIN32(res);
+}
+
+/*
+  Removes a single '\' or '/' from end of path 
+*/
+static char *remove_slash(char *path)
+{
+  int len = strlen(path);
+
+  if (!len)
+    return path;
+
+  if (path[len-1] == '/' || path[len-1] == '\\')
+    path[len-1] = 0;
+
+  return path;
+}
+
+/*
+  Returns heap string containing default application data path.
+  Creates suffix subdirectory (only one level).
+  E.g. C:\Documents and Settings\jfp\Application Data\suffix
+*/
+char *GetDefaultSaveDir(const char *suffix)
+{
+  char          prefix[MAX_PATH];
+  char          path[2*MAX_PATH];
+  const char   *key    = "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders";
+  const char   *option = "AppData";
+  HRESULT hr = S_OK;
+
+  if (SUCCEEDED(hr = ReadRegistry(key, option, prefix, sizeof(prefix))))
+  {
+    remove_slash(prefix);
+    snprintf(path, sizeof(path), "%s/%s", prefix, suffix);
+    _mkdir(path);
+    return strdup(path);
+  }
+  return strdup("userdata");
+}
+
+