National Instruments Window, User Manual

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 National Instruments Corporation

17

LabWindows/CVI Release Notes for Windows

checking for events. Use this function if you require LabWindows/CVI to use more CPU 
resources so that other applications are given less processor time.

Clarifications and Corrections

The previous version of the manual incorrectly states that values for 

ATTR_XOFFSET

 and 

ATTR_YOFFSET

 are expressed in inches. In fact, they are expressed in tenths of millimeters.

SetSystemPopupsAttribute

 and 

GetSystemPopupsAttribute

 do not apply to 

Windows dialog boxes the User Interface Library uses. For example, you cannot use 

SetSystemPopupAttribute

 to make the Windows file select dialog box movable.

The top-level panel callback receives the 

EVENT_CLOSE

 message when the user executes the 

Close command from the System menu or clicks on the X button at the right end of the panel 
titlebar.

The main callback receives the 

EVENT_END_TASK

 message when the user tries to shut down 

Windows or when the user tries to terminate your application, for example, by executing 
the Close command from taskbar button of the main thread.

When using the new function 

SetBitmapData

 on a bitmap that already has 

a mask, you can either supply the same mask array, supply a new mask array, 
or pass

REMOVE_TRANSPARENCY_MASK

 to remove the mask. When you use 

REMOVE_TRANSPARENCY_MASK

, the color of the pixels that were transparent under the 

old mask are unpredictable. You can set the value of these pixels in the bits parameter.

The following text is incorrect in the Using Callback Functions to Respond to User 
Interface Events section of Chapter 3, Programming with the User Interface Library, 
in the LabWindows/CVI User Interface Reference Manual: “A panel callback receives the 

EVENT_SIZE

 and 

EVENT_MOVE

 messages when the user resizes or moves the panel. The 

panel callback does not receive these messages when you programmatically resize or move 
a panel.”

LabWindows/CVI posts the events 

EVENT_PANEL_MOVE

 and 

EVENT_PANEL_SIZE

 when 

you programmatically move or resize a panel. The panel callback receives the events 
when the application processes events.

The manual incorrectly defines the return value description for 

InsertSeparator

.  

The returned integer parameter is defined as follows:

Direct Windows Printing

On all Windows platforms, the User Interface Library now uses direct Windows printing 
by default. Previously, the library used only bitmap printing. The new print attribute 

ATTR_BITMAP_PRINTING

 specifies whether to use bitmap printing or direct printing.

menuItemID

Returns the ID that LabWindows/CVI uses to specify this menu item 
in subsequent function calls. Negative values indicate that an error 
occurred.  Refer to Appendix A for error codes.