ArcGIS Engine Developer Guide

C++ APPLICATION PROGRAMMING INTERFACE
Undocking windows
If the Output window (or any docked window, for that matter) seems too
small to you, try undocking it to make it a real window. Right-click it and
toggle the Docking View item.
Conditional break points
Use conditional break points when you need to stop at a break point once some
condition is reached (for example, a for-loop reaching a particular counter value).
To do so, set the break point normally, then bring up the Breakpoints window
(Ctrl+B or Alt+F9). Select the specific break point you just set and click the
Condition button to display a dialog box in which you specify the break point
condition.
Preloading DLLs
You can preload DLLs that you want to debug before executing the program.
This allows you to set break points up front rather than wait until the DLL has
been loaded during program execution. (Click Project, click Settings, click Debug,
click Category, then click Additional DLLs.) Then, click in the list area below to
add any DLLs you want to have preloaded.
Changing display formats
You can change the display format of variables in the QuickWatch dialog box or
in the Watch window using the formatting symbols in the following table.
Symbol Format
Value
Displays
d, i signed decimal integer
0xF000F065 -268373915
u unsigned decimal integer 0x0065 101
o unsigned octal integer 0xF065 0170145
x, X hexadecimal integer 61541 0x0000F065
l, h long or short prefix for d, I, u, o, x, X 00406042, hx 0x0C22
f signed floating-point 3./2. 1.500000
e signed scientific notation 3./2. 1.500000e+00
g e or f, whichever is shorter 3./2. 1.5
c single character 0x0065 'e'
s string 0x0012FDE8 "Hello"
su Unicode string "Hello"
hr string 0 S_OK
To use a formatting symbol, type the variable name followed by a comma and the
appropriate symbol. For example, if var has a value of 0x0065, and you want to
see the value in character form, type “var,c” in the Name column on the tab of
the Watch window. When you press Enter, the character-format value appears:
var,c = ‘e’. Likewise, assuming that hr is a variable holding HRESULTs, view a
human-readable form of the HRESULT by typing “hr,hr” in the Name column.
Chapter 4 • Developer environments • 203