Alphanumeric Windows Password

Title: Alphanumeric Windows Password
What is this: This trick will control wether windows will require alphanumeric password or not
Valid for: All Windows
Registry Keys:
System Key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Network
User Key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Network
Changes:
Create new or modify existing DWord value called "AlphanumPwds"
value=1 means only alphanumeric password is acceptale
value=0 means any password is acceptale