DtHelpQuickDialog(UNIX System V (1 August 199DtHelpQuickDialog(3)
NAME
DtHelpQuickDialog - DtHelpQuickDialog widget class
SYNOPSIS
#include <Dt/HelpQuickD.h>
DESCRIPTION
The DtHelpQuickDialog widget provides users with a
constrained set of functionality for viewing and and
navigating structured online information (CDE help volumes).
This functionality includes text and graphics rendering,
embedded hypertext links and limited navigation methods to
move through online help information. The widget supports
rendering of CDE help volume, system manual pages, text
files and character string values.
When the user resizes the window, the DtHelpQuickDialog
widget dynamically reformats its contents to fit the new
window size if the DtNhelpType of the contents is
DtHELP_TYPE_TOPIC or DtHELP_TYPE_DYNAMIC_STRING. If the
DtNhelpType of the contents is DtHELP_TYPE_STRING,
DtHELP_TYPE_MAN_PAGE or DtHELP_TYPE_FILE, the contents are
not reformatted. Instead, scroll bars may appear when the
user resizes the window smaller than the help contents. The
exact scrollbar behavior is controlled by the
DtNscrollBarPolicy resource.
Users can re-specify certain resources for the automatically
created widget contained within the DtHelpQuickDialog
hierarchy. The following is the name of the widget:
Display Area - DisplayArea
The DtHelpQuickDialog widget honors all default and user-
specified resource settings, with one exception. In the
case where an error occurs due to a non-valid request, the
widget posts the proper error message in its display area,
and modifies the DtNhelpType to reflect the current contents
of the display area (that is, a string message).
Applications and users should set the DtNhelpType to the
appropriate value with each setting of the help value.
Classes
The DtHelpQuickDialog widget inherits behavior and resources
from the Core, Composite, Constraint, XmManager and
XmBulletinBoard classes.
The class pointer is dtHelpQuickDialogClass.
The class name is DtHelpQuickDialog.
New Resources
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To reference a resource by name or by class in a .Xdefaults
file, the application must remove the DtN or DtC prefix and
use the remaining letters. To specify one of the defined
values for a resource in a .Xdefaults file, the application
must remove the Dt prefix and use the remaining letters (in
either lower case or upper case, but including any
underscores between words). The codes in the access column
indicate if the given resource can be set at creation time
(C), set by using XtSetValues() (S), retrieved by using
XtGetValues() (G), or is not applicable (N/A).
DtHelpQuickDialog Resource Set
________________________________________________________________________
Name Class Type Default Access
________________________________________________________________________
DtNbackLabelString DtCBackLabelString XmString Back Track CSG
DtNcloseCallback DtCCloseBtnCallbackXtCallbackListNULL C
DtNcloseLabelStringDtCcloseLabelStringXmString Close CSG
DtNcolumns DtCColumns Dimension 50 CSG
DtNexecutionPolicy DtCExecutionPolicy unsigned char DtHELP_- CSG
EXECUTE-
_QUERY-
_UNALIASED
DtNhelpFile DtCHelpFile char * NULL CSG
DtNhelpLabelString DtCHelpLabelString XmString Help CSG
DtNhelpOnHelp- DtCHelpOnHelp- char * See DefinitionC
Volume Volume
DtNhelpPrint DtCHelpPrint char * See DefinitionCSG
DtNhelpType DtCHelpType unsigned char DtHELP_TYPE- CSG
_TOPIC
DtNhelpVolume DtCHelpVolume char * NULL CSG
DtNhyperLink- DtCHyperLink- XtCallbackListNULL C
Callback Callback
DtNlocationId DtCLocationId char * See DefinitionCSG
DtNmanPage DtCManPage char * NULL CSG
DtNminimizeButtons DtCMinimizeButtons Boolean True C
DtNmoreLabelString DtCMoreLabelString XmString More CSG
DtNpaperSize DtCPaperSize unsigned char See DefinitionC
DtNprinter DtCPrinter char * NULL CSG
DtNprintLabelStringDtCPrintLabelStringXmString Print... CSG
DtNrows DtCRows Dimension 15 CSG
DtNscrollBarPolicy DtCScrollBarPolicy unsigned char DtHELP_AS- C
_NEEDED-
_SCROLLBARS
DtNstringData DtCStringData char * NULL CSG
DtNtopicTitle DtCTopicTitle char * NULL CSG
DtNbackLabelString
Specifies the string label for the Back button.
DtNcloseCallback
Specifies the list of callbacks called when the
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application activates the Close button. The
callback reason is DtCR_HELP_CLOSE.
DtNcloseLabelString
Specifies the string label for the Close button.
DtNcolumns
Specifies the number of columns of text to display
in the DtHelpQuickDialog widget display area.
DtNexecutionPolicy
Specifies how to handle ``Execute'' hypertext link
types and embedded scripts. The default value is
set to DtHELP_EXECUTE_QUERY_UNALIASED and supports
different semantics based on the usage of a command
alias. Refer to the CDE Help System Author's and
Programmer's Guide for more information on command
alias usage. With the default value and no command
alias, a query dialog will be posted upon user
selection of an execute hypertext link. The dialog
will show the command that has been specified and
give the user the option to ``Execute Anyway,''
``Don't Execute'' or request help for more
information. When a command alias is present for
the selected link, the command will execute
silently, and no query dialog will be posted.
Other values for this resource are
DtHELP_EXECUTE_NONE, DtHELP_EXECUTE_ALL and
DtHELP_EXECUTE_QUERY_ALL. DtHELP_EXECUTE_NONE
forces all execute hypertext links to be ignored.
DtHELP_EXECUTE_ALL allows all execute hypertext
links to be executed silently upon link selection
by the user, and DtHELP_EXECUTE_QUERY_ALL forces
the query dialog to be posted with every link
invocation.
DtNhelpFile
Specifies the absolute pathname of a text file to
be read and displayed. This resource is used when
the DtNhelpType is set to DtHELP_TYPE_FILE. The
topic title is required in order to maintain an
accurate and descriptive history list.
DtNhelpLabelString
Specifies the string label for the Help button.
DtNhelpOnHelpVolume
Specifies the help volume that contains the help
topics for the help user interface components in
the widget. This is displayed in an instance of
the DtHelpQuickDialog widget when the user requests
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help from within the widget. The default value for
this resource is Help4Help, which refers to the
default supported help volume. This resource
supports absolute pathnames and pathless help
volume names. When just a volume name is used, the
volume must be placed or linked to one of the
default search locations, or one of the two help
search path environment variables must be properly
set. See the ENVIRONMENT VARIABLES section for
more information on setting and modifying these
variables.
DtNhelpPrint
Specifies the location of the dthelpprint utility
used to print help topics, manual pages, files or
help messages from the DtHelpQuickDialog widget.
This value defaults to /usr/dt/bin/dthelpprint.
DtNhelpType
Specifies the current topic type. When the value
is DtHELP_TYPE_TOPIC, the DtNlocationId and
DtNhelpVolume resources are used and the requested
help topic is displayed. When the value is
DtHELP_TYPE_STRING or DtHELP_TYPE_DYNAMIC_STRING,
the DtNstringData resource is used and the
requested string is displayed. When the value is
DtHELP_TYPE_FILE, the DtNhelpFile resource is used
and the requested text file is displayed. When the
value is DtHELP_TYPE_MAN, the DtNmanPage resource
is used and the requested system manual page is
displayed. The initial default value is
DtHELP_TYPE_TOPIC; however, each time there is a
request to display a help topic, text file, manual
page or text string, the user should reset
DtNhelpType to the proper type.
DtNhelpVolume
Specifies the help volume to use. This resource is
used in conjunction with the DtNlocationId resource
to display help topics. This resource supports
absolute pathnames and pathless help volume names.
When using just a volume name, the volume must be
placed in or linked to one of the default search
locations, or one of the two help search path
environment variables must be properly set. See
the ENVIRONMENT VARIABLES section for more
information on setting and modifying these
variables.
DtNhyperLinkCallback
Specifies the callback called when a client-
specific hypertext link type is activated in the
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display area of the DtHelpQuickDialog widget.
Links are activated when the user presses mouse
button 1 over a hypertext link, or presses
<KActivate> with the keyboard focus on the
hypertext link item. The callback reason is
DtCR_HELP_LINK_ACTIVATE. DtNhyperLinkCallback
allows applications to register a callback
procedure used to process one of four hypertext
link types: DtHELP_LINK_APP_DEFINE, DtHELP_LINK_-
TOPIC, DtHELP_LINK_MAN_PAGE or DtHELP_LINK_-
TEXT_FILE. For the DtHELP_LINK_TOPIC, the callback
is made only when the windowHint value in the
callback structure is DtHELP_NEW_WINDOW.
DtNlocationId
Specifies a help topic to display. Applications
reference topics within a help volume using a
location ID. Location IDs are author-defined at
help volume creation time. Applications use these
location IDs to display the desired help topic.
The default value for this resource is _HOMETOPIC,
which refers to the help volume's top level topic.
DtNhelpVolume must be set to the help volume in
which the corresponding location ID resides, and
DtNhelpType must be set to DtHELP_TYPE_TOPIC.
DtNmanPage
Specifies the system manual page to display in the
current DtHelpQuickDialog widget. This resource is
used when the DtNhelpType is set to DtHELP_TYPE_-
MAN_PAGE.
DtNminimizeButtons
Sets the buttons to the width of the widest button
and the height of the tallest button if False. If
True, button width and height are not modified.
DtNmoreLabelString
Specifies the string label for the More button.
DtNpaperSize
Controls the value used in the Help-Print dialog
for paper size. The default value is set to
DtHELP_PAPERSIZE_LETTER. Other supported values
for this resource are: DtHELP_PAPERSIZE_LEGAL,
DtHELP_PAPERSIZE_EXECUTIVE, DtHELP_PAPERSIZE_A4,
DtHELP_PAPERSIZE_B5.
DtNprinter
Specifies the printer name used to print within the
DtHelpQuickDialog widget. If the value is NULL,
the default value is taken from the LPDEST
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environment variable.
DtNprintLabelString
Specifies the string label for the Print button.
DtNrows
Specifies the number of rows of text to display in
the display area of the DtHelpQuickDialog widget.
DtNscrollBarPolicy
Controls the automatic placement of scroll bars in
the text display area. If it is set to
DtHELP_AS_NEEDED_SCROLLBARS, the scroll bars are
displayed only if the display area exceeds the clip
area in one or both dimensions. A resource value
of DtHELP_STATIC_SCROLLBARS causes the display area
to display the scroll bars whenever the
DtHelpQuickDialog widget is managed, regardless of
the relationship between the clip window and the
display area. A value of DtHELP_NO_SCROLLBARS
removes scroll bars from the DtHelpQuickDialog
widget. The default value is DtHELP_AS_NEEDED_-
SCROLLBARS.
DtNstringData
Specifies the string data (char *) to display in
the current DtHelpQuickDialog widget. This
resource is used when the DtNhelpType is set to
DtHELP_TYPE_STRING.
DtNtopicTitle
Specifies the topic title (char *) to be used in
conjunction with either the DtNstringData or
DtNhelpFile resource. The topic title is required
in order to maintain an accurate and descriptive
history list. The topic title is also used as the
default heading for the banner page and page header
when printing. When printing help topics, this
resource may be ignored.
Inherited Resources
The DtHelpQuickDialog widget inherits behavior and resources
from the following named superclasses. For a complete
description of each resource, see the man page for that
superclass.
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XmBulletinBoard Resource Set
_____________________________________________________________________
Name Class Type Default Access
_____________________________________________________________________
XmNallowOverlap XmCAllowOverlap Boolean True CSG
XmNautoUnmanage XmCAutoUnmanage Boolean True CG
XmNbuttonFontList XmCButtonFontList XmFontList dynamic CSG
XmNcancelButton XmCWidget Widget dynamic SG
XmNdefaultButton XmCWidget Widget dynamic SG
XmNdefaultPosition XmCDefaultPositionBoolean True CSG
XmNdialogStyle XmCDialogStyle unsigned char dynamic CSG
XmNdialogTitle XmCDialogTitle XmString NULL CSG
XmNfocusCallback XmCCallback XtCallbackListNULL C
XmNlabelFontList XmCLabelFontList XmFontList dynamic CSG
XmNmapCallback XmCCallback XtCallbackListNULL C
XmNmarginHeight XmCMarginHeight Dimension 10 CSG
XmNmarginWidth XmCMarginWidth Dimension 10 CSG
XmNnoResize XmCNoResize Boolean False CSG
XmNresizePolicy XmCResizePolicy unsigned char XmRESIZE_ANYCSG
XmNshadowType XmCShadowType unsigned char XmSHADOW_OUTCSG
XmNtextFontList XmCTextFontList XmFontList dynamic CSG
XmNtextTranslationsXmCTranslations XtTranslationsNULL C
XmNunmapCallback XmCCallback XtCallbackListNULL C
XmManager Resource Set
______________________________________________________________________
Name Class Type Default Access
______________________________________________________________________
XmNbottom- XmCBottom- Pixel dynamic CSG
ShadowColor ShadowColor
XmNbottom- XmCBottom- Pixmap XmUNSPECIFIED-CSG
ShadowPixmap ShadowPixmap _PIXMAP
XmNforeground XmCForeground Pixel dynamic CSG
XmNhelpCallback XmCCallback XtCallbackListNULL C
XmNhighlightColor XmCHighlightColor Pixel dynamic CSG
XmNhighlightPixmapXmCHighlightPixmapPixmap dynamic CSG
XmNinitialFocus XmCInitialFocus Widget dynamic CSG
XmNnavigationType XmCNavigationType XmNavigation- XmTAB_GROUP CSG
Type
XmNshadowThicknessXmCShadowThicknessDimension dynamic CSG
XmNstringDirectionXmCStringDirectionXmString- dynamic CG
Direction
XmNtopShadowColor XmCTopShadowColor Pixel dynamic CSG
XmNtopShadowPixmapXmCTopShadowPixmapPixmap dynamic CSG
XmNtraversalOn XmCTraversalOn Boolean True CSG
XmNunitType XmCUnitType unsigned char dynamic CSG
XmNuserData XmCUserData XtPointer NULL CSG
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Composite Resource Set
_________________________________________________________________
Name Class Type Default Access
_________________________________________________________________
XmNchildren XmCReadOnly WidgetList NULL G
XmNinsertPosition XmCInsertPosition XtOrderProc NULL CSG
XmNnumChildren XmCReadOnly Cardinal 0 G
Core Resource Set
_______________________________________________________________________________
Name Class Type Default Access
_______________________________________________________________________________
XmNaccelerators XmCAccelerators XtAcceleratorsdynamic N/A
XmNancestorSensitiveXmCSensitive Boolean dynamic G
XmNbackground XmCBackground Pixel dynamic CSG
XmNbackgroundPixmap XmCPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
XmNborderColor XmCBorderColor Pixel XtDefaultForegroundCSG
XmNborderPixmap XmCPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
XmNborderWidth XmCBorderWidth Dimension 0 CSG
XmNcolormap XmCColormap Colormap dynamic CG
XmNdepth XmCDepth int dynamic CG
XmNdestroyCallback XmCCallback XtCallbackListNULL C
XmNheight XmCHeight Dimension dynamic CSG
XmNinitialResources-XmCInitialResources-Boolean True C
Persistent Persistent
XmNmappedWhen- XmCMappedWhen- Boolean True CSG
Managed Managed
XmNscreen XmCScreen Screen * dynamic CG
XmNsensitive XmCSensitive Boolean True CSG
XmNtranslations XmCTranslations XtTranslationsdynamic CSG
XmNwidth XmCWidth Dimension dynamic CSG
XmNx XmCPosition Position 0 CSG
XmNy XmCPosition Position 0 CSG
Callback Information
A pointer to the following structure is passed to each
callback:
typedef struct {
int reason;
XEvent *event;
char *locationId;
char *helpVolume;
char *specification;
int hyperType;
int windowHint;
} DtHelpDialogCallbackStruct;
The reason argument indicates why the callback was invoked.
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The event argument points to the XEvent that triggered the
callback.
The locationId argument indicates the DtNlocationId for the
current topic. This value is NULL whenever the hyperType
value is not DtHELP_LINK_TOPIC or DtHELP_LINK_APP_DEFINE.
The helpVolume argument indicates the current help volume.
This value returns NULL whenever the hyperType value is not
DtHELP_LINK_TOPIC or DtHELP_LINK_APP_DEFINE.
The specification argument indicates any author-defined data
contained within the selected hypertext link. This value
returns NULL if no author-defined data was given. For
hyperlinks of type DtHELP_MAN_PAGE, the specification
argument contains the name of the manual page. For
hyperlinks of type DtHELP_LINK_TEXT_FILE, the specification
argument contains that name of the file.
The hyperType argument indicates the hypertext link type.
Possible values are: DtHELP_LINK_TOPIC, DtHELP_LINK_-
MAN_PAGE, DtHELP_LINK_APP_DEFINE or DtHELP_LINK_TEXT_FILE.
The windowHint argument indicates a hint for the type of
window (current window, DtHelpQuickDialog widget window or
new window) to use. This value contains one of the
following three types: DtHELP_POPUP_WINDOW,
DtHELP_CURRENT_WINDOW or DtHELP_NEW_WINDOW.
Additional Behavior
The DtHelpQuickDialog widget has the additional behavior
described below:
<MAny> <KCancel>
Calls the active callbacks for the Close button.
If a <BDrag> for either a selection or scrollbar
movement is in process, the KCancel aborts that
action.
<KSpace>, <KActivate> or <BSelect> in Display Area Text
Invokes the hypertext link that contains the
current selection.
<DoubleClick> in Display Area Text
Ignored.
<BDrag> in Display Area Text
Selects the text from the drag start point to the
drag end point. Moving and holding the <BDrag>
outside the topic tree or display area, scrolls the
window, selecting the newly exposed text.
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<Close Button Activated>
Closes the DtHelpQuickDialog widget, and calls the
DtNcloseCallback callbacks with reason
DtCR_HELP_CLOSE.
<Backtrack Button Activated>
Forces the DtHelpQuickDialog widget to display the
data previously displayed in the dialog. If the
current item was the first item displayed in the
DtHelpQuickDialog widget, the Backtrack button is
insensitive.
<Print Button Activated>
Forces the DtHelpQuickDialog widget to display the
Help-Print dialog.
<Help Button Activated>
Forces the DtHelpQuickDialog widget to display the
Help-On-Help dialog.
Text
<MCtrl> or <MShift> <BSelect> in Display Area Hypertext Link
<MCtrl> <KSpace> in Display Area Hypertext Link Text
<MCtrl> <KActivate> in Display Area Hypertext Link Text
Invokes the DtNhyperLinkCallback for the
DtHelpQuickDialog widget, honoring all existing
link settings, but forces the windowHint to
DtHELP_NEW_WINDOW. If no DtNhyperLinkCallback was
supplied, the hypertext link is handled internally.
<KSelectAll> in Display Area
Selects all text within the display area.
<KDeSelectAll> in Display Area
Deselects all text within the display area.
<KUp> or <KLeft> in Display Area
Moves the traversal highlight up or left to the
next hypertext link item.
<KDown> or <KRight> in Display Area
Moves the traversal highlight down or right to the
next hypertext item.
<KCopy> in the Display Area
Copies the currently selected text to the
clipboard.
<KPageDown> or <MCtrl> <KDown> in the Display Area
Displays the next page of text.
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<KPageLeft> or <MCtrl> <KLeft> in Display Area
Scrolls the information to the left.
<KPageRight> or <MCtrl> <KRight> in Display Area
Scrolls the information to the right.
<KPageUp> or <MCtrl> <KUp> in Display Area
Displays the previous page of information.
<KBeginData> in the Display Area
Displays the first page of information.
<KEndData> in the Display Area
Displays the last page of information.
Virtual Bindings
The bindings for virtual keys are implementation-dependent.
For information about bindings for virtual buttons and keys,
see VirtualBindings(3X).
ENVIRONMENT VARIABLES
The DtHelpQuickDialog widget uses two environment variables
for locating help volumes within the desktop environment:
DTHELPSEARCHPATH
The system search path environment variable for
locating help volumes on local and remote NFS
mounted systems.
DTHELPUSERSEARCHPATH
The search path environment variable for locating
user-specific help volumes on local and remote NFS
mounted systems.
The environment variables contain colon-separated lists of
directory paths. Each directory path can contain both
environment variable names as well as special field
descriptors that are expanded at runtime.
Field descriptors consist of a percent-sign character (%)
followed by a single character. Field descriptors and their
substitution values are:
%H Replaced with the current volume name being
searched for.
%L Replaced with the current value of the LANG
environment variable.
%% Replaced with a single %.
The default value for DTHELPUSERSEARCHPATH is:
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$HOME/.dt/help/$DTUSERSESSION/%H:
$HOME/.dt/help/$DTUSERSESSION/%H.sdl:
$HOME/.dt/help/$DTUSERSESSION/%H.hv:
$HOME/.dt/help/%H:
$HOME/.dt/help/%H.sdl:
$HOME/.dt/help/%H.hv
The DTHELPUSERSEARCHPATH is first searched for the requested
volume. If the volume is not found, the DTHELPSEARCHPATH
value is searched.
The default value for DTHELPSEARCHPATH path is:
/etc/dt/appconfig/help/%L/%H:
/etc/dt/appconfig/help/%L/%H.sdl:
/etc/dt/appconfig/help/%L/%H.hv:
/etc/dt/appconfig/help/C/%H:
/etc/dt/appconfig/help/C/%H.sdl:
/etc/dt/appconfig/help/C/%H.hv:
/usr/dt/appconfig/help/%L/%H:
/usr/dt/appconfig/help/%L/%H.sdl:
/usr/dt/appconfig/help/%L/%H.hv:
/usr/dt/appconfig/help/C/%H:
/usr/dt/appconfig/help/C/%H.sdl:
/usr/dt/appconfig/help/C/%H.hv
APPLICATION USAGE
The following messages can be generated as a result of an
error or improperly set resource value in the
DtHelpQuickDialog widget These messages are displayed in the
widget's display area as well as standard error.
Error Messages
String data could not be formatted.
The error occurred when formatting help information of
type DtHELP_TYPE_STRING.
Dynamic string data could not be formatted.
The error occurred when formatting help information of
type DtHELP_TYPE_DYNAMIC_STRING.
Man Page could not be formatted. The requested man page
is either not present, or corrupt.
The error occurred when formatting help information of
type DtHELP_TYPE_MAN_PAGE.
Text file could not be formatted. The requested text file
is either not present, or corrupt.
The error occurred when formatting help information of
type DtHELP_TYPE_FILE.
Non-supported DtNhelpType value used.
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The application used a non-supported DtNhelpType.
Help topic could not be formatted.
The application attempted to access a corrupt runtime
help file.
No DtNhyperLinkCallback supplied for widget.
A hypertext link of type DtHELP_NEW_WINDOW is
selected, but the application has not supplied a
hypertext callback to handle it. The link is handled
like a DtHELP_CURRENT_WINDOW jump.
Nonexistent DtNlocationId.
The requested DtNlocationId is not present in the
current help volume.
No DtNhyperLinkCallback supplied for widget to handle
DtHELP_LINK_APP_DEFINE or DtHELP_LINK_MAN_PAGE links.
A hypertext link of type DtHELP_LINK_APP_DEFINE or
DtHELP_LINK_MAN_PAGE is selected, but the application
has not supplied a hypertext callback.
Could not find DtNhelpVolume.
The Help System is unable to find the help volume
requested.
Could not open DtNhelpVolume.
The Help System found the requested help volume, but
does not have the permission to open it.
SEE ALSO
DtHelpDialog(5), DtHelp(5), DtCreateHelpDialog(3),
DtHelpSetCatalogName(3), DtHelpQuickDialogGetChild(3);
XmManager(3X), XmBulletinBoard(3X), Core(3X), Composite(3X),
Constraint(3X), VirtualBindings(3X), dthelptagdtd(4).
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