National Instruments 320682C EnableBreakOnLibraryErrors, EnableInterrupts

Chapter 8 Utility Library

• Do not use the Standard I/O Window in your final application.

• If you use any of the built-in pop-ups in the User Interface Library, make the following calls.

SetSystemPopupsAttribute (ATTR_MOVABLE, 0);

SetSystemPopupsAttribute (ATTR_SYSTEM_MENU_VISIBLE, 0);

An alternative approach is available on Windows 95 and NT. You can enable timer control

callbacks while <Alt-Tab> is pressed, while the system menu is pulled down, or (in some cases)

while a window is being moved or sized. You can do this by using the following function call.

SetSystemAttribute (ATTR_ALLOW_UNSAFE_TIMER_EVENTS, 1);

This alternative is incomplete and can be unsafe. See the discussion on Unsafe Timer Events in

the Using the System Attributes section of Chapter 3, Programming with the User Interface

Library, of the LabWindows/CVI User Interface Reference Manual.

EnableBreakOnLibraryErrors

void EnableBreakOnLibraryErrors (void);

Purpose

If debugging is enabled (if the debugging level in the Run Options dialog box of the Options

menu in the Project window is set to Standard or Extended), this function directs

LabWindows/CVI to display a run-time error dialog box when a National Instruments library

function reports an error. If debugging is disabled, this function has no effect.

In general, you should check the Break on Library Errors check box in the Run Options dialog

box of the Options menu in the Project window to enable this feature. However, you can use this

function in conjunction with DisableBreakOnLibraryErrors to temporarily suppress the

Break on Library Errors feature around a segment of code. It does not affect the state of the

Break on Library Errors check box.

Note: This function has been superseded by SetBreakOnLibraryErrors.

EnableInterrupts

void EnableInterrupts (void);

Under Windows 3.1 and Windows 95, this function uses the STI instruction to turn on all

maskable 80x86 interrupts. On UNIX, this function reverses the effect of the last call to

DisableInterrupts. It restores the signal processing state to the condition prior to the

DisableInterrupts call.