Cipher questions

• Given two points, find a third point on the line
• Change mouse cursor in Silverlight
• Generate a number different from the numbers in the array
• JSON output from the page
• Add a website to IIS on localhost
• C# equivalent to C `system()` standard library function
• Cannot open database requested by the login. The login failed. Login failed for user
• getline in istream and getline in basic_string
• No matching function call to class member
• Changing brightness of display (C#) [duplicate]

Cipher answers