Mr Aleph questions

• Get current user's last logon
• Public key implementation in C for Linux
• Changing the directory of Delphi OpenDialog
• Disabling specific cells on an NSTableView
• Verifying app's signature by code [duplicate]
• Accepting dragged files on a Cocoa application
• libcurl HTTPS POST data send?
• Calling Cocoa APIs from C
• Converting a CFStringRef to char *
• creating an XCode project with existing code

Mr Aleph answers