Visual Basic 2012 Programmer's Reference

MARGIN ICONS

The gray margin to the left of the line numbers contains icons giving information about the corresponding lines of code. The following table describes the icons on lines 4 through 13.

LINE	ICON	INDICATES
4	Arrow	Execution is paused at this line
5	Red circle	A breakpoint
6	Hollow red circle	A disabled breakpoint
7	Red circle with plus sign	A breakpoint with a condition or hit count test
11	Red diamond	A breakpoint that executes an action when reached
12	Gray ribbon	A bookmark
13	Hollow diamond and plus sign	A disabled breakpoint with a hit test or condition that performs an action

BREAK TIME

A breakpoint is a line of code that you have flagged to stop execution so you can test and debug the program. When you run the program in the IDE, the program stops at the breakpoint and lets you see what routines called what other routines, examine variable values, change variables, and so forth to figure out what’s happening. For more information on breakpoints and debugging, see Chapter 6, “Debugging.”

These icons can combine to indicate more than one condition. For example, line 13 shows a blue and white rectangle to indicate a bookmark, a hollow red diamond to indicate a disabled breakpoint that performs an action, and a plus sign to indicate that the breakpoint has a condition or hit count test.

Note that the editor marks some of these lines in other ways than just an icon. It highlights the currently executing line with a yellow background. It ...