MicroStation is fairly consistent in how it displays prompts and messages in the Status bar at the bottom of the window. To make your macros mimic standard MicroStation commands you should display messages in these areas as well.

ShowCommand

The ShowCommand method displays a string expression in the Command field of the status bar.

ShowCommand “MyMacro”

ShowError

The ShowError method displays a string expression in the Error field of the status bar.

ShowError “Invalid Input”

ShowPrompt

The ShowPrompt method displays a string expression in the Prompt field of the status bar.

ShowPrompt “Enter first vertex”

ShowStatus

The ShowStatus method displays a string expression in the Status field of the status bar.

ShowStatus “MyMacro Exited”

ShowMessage

The ShowMessage method displays a string expression in the Message Center area of the status bar.

ShowMessage “Thank you for using MyMacro”