Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
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permit persons to whom the Software is furnished to do so, subject to
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The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall
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Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
Digital Equipment Corporation

Portions Copyright \(co 1990, 1991 by
Tektronix, Inc.

Permission to use, copy, modify and distribute this documentation for
any purpose and without fee is hereby granted, provided that the above
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and this permission notice appear in all copies, and that the names of
Digital and Tektronix not be used in in advertising or publicity pertaining
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Digital and Tektronix makes no representations about the suitability
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It is provided "as is" without express or implied warranty.


XAllocClassHint, XSetClassHint, XGetClassHint, XClassHint - allocate class hints structure and set or read a window's WM_CLASS property

XClassHint *XAllocClassHint\^(void\^);

XSetClassHint\^(\^Display *display, Window w, XClassHint *class_hints\^);

Status XGetClassHint\^(\^Display *display, Window w, XClassHint *class_hints_return\^);

Specifies the connection to the X server. Specifies the XClassHint structure that is to be used. Returns the XClassHint structure. Specifies the window. The XAllocClassHint function allocates and returns a pointer to a XClassHint structure. Note that the pointer fields in the XClassHint structure are initially set to NULL. If insufficient memory is available, XAllocClassHint returns NULL. To free the memory allocated to this structure, use XFree .

The XSetClassHint function sets the class hint for the specified window. If the strings are not in the Host Portable Character Encoding, the result is implementation-dependent.

XSetClassHint can generate BadAlloc and BadWindow errors.

The XGetClassHint function returns the class hint of the specified window to the members of the supplied structure. If the data returned by the server is in the Latin Portable Character Encoding, then the returned strings are in the Host Portable Character Encoding. Otherwise, the result is implementation-dependent. It returns a nonzero status on success; otherwise, it returns a zero status. To free res_name and res_class when finished with the strings, use XFree on each individually.

XGetClassHint can generate a BadWindow error.

1i \s-1WM_CLASS\s+1 Set by application programs to allow window and session managers to obtain the application's resources from the resource database.

The XClassHint structure contains:

.EX typedef struct { char *res_name; char *res_class; } XClassHint;

The res_name member contains the application name, and the res_class member contains the application class. Note that the name set in this property may differ from the name set as WM_NAME. That is, WM_NAME specifies what should be displayed in the title bar and, therefore, can contain temporal information (for example, the name of a file currently in an editor's buffer). On the other hand, the name specified as part of WM_CLASS is the formal name of the application that should be used when retrieving the application's resources from the resource database.

1i BadAlloc The server failed to allocate the requested resource or server memory.

1i BadWindow A value for a Window argument does not name a defined Window.

XAllocIconSize(__libmansuffix__), XAllocSizeHints(__libmansuffix__), XAllocWMHints(__libmansuffix__), XFree(__libmansuffix__), XSetCommand(__libmansuffix__), XSetTransientForHint(__libmansuffix__), XSetTextProperty(__libmansuffix__), XSetWMClientMachine(__libmansuffix__), XSetWMColormapWindows(__libmansuffix__), XSetWMIconName(__libmansuffix__), XSetWMName(__libmansuffix__), XSetWMProperties(__libmansuffix__), XSetWMProtocols(__libmansuffix__), XStringListToTextProperty(__libmansuffix__)

\*(xL