dev_update_pc — Switches the update of the PC during program execution on or off.
dev_update_pc( : : DisplayMode : )
dev_update_pc specifies the behaviour of the PC during program execution. If DisplayMode is set to VarRef('on'), which is the default, within the selected procedure the PC is always displayed left to the currently executed operator. In addition the program text is scrolled---if necessary---so that the current operator is visible.
If the mode is 'off' the PC is not visible during program execution and the program text will not be scrolled automatically. When the program stops the PC becomes visible again and the listing is scrolled to the current PC position.
For measuring the execution time of a sequence of operators all update options should be switched off in order to reduce the influence of the runtime of GUI updates in HDevelop. For this the operators dev_update_pc, dev_update_time, dev_update_var, and dev_update_window or the procedures dev_update_on and dev_update_off can be used.
This option can also be controlled via the Preferences dialog: Edit -> Preferences -> Runtime Settings -> Update Program Counter.
This operator is not supported for code export.
Mode for runtime behaviour.
Default value: 'off'
List of values: 'off', 'on'
If the values of the specified parameters are correct dev_update_pc returns 2 (H_MSG_TRUE). Otherwise an exception is raised and an error code returned.