Key Values functions for manipulating keyboard codes. Key values are the codes which are sent whenever a key is pressed or released. They appear in the keyval field of the #GdkEventKey structure, which is passed to signal handlers for the "key-press-event" and "key-release-event" signals. The complete list of key values can be found in the <gdk/gdkkeysyms.h> header file. Key values can be converted into a string representation using gdk_keyval_name(). The reverse function, converting a string to a key value, is provided by gdk_keyval_from_name(). The case of key values can be determined using gdk_keyval_is_upper() and gdk_keyval_is_lower(). Key values can be converted to upper or lower case using gdk_keyval_to_upper() and gdk_keyval_to_lower(). Converts a key value into a symbolic name. The names are the same as those in the <gdk/gdkkeysyms.h> header file but without the leading "GDK_". @keyval: a key value. @Returns: a string containing the name of the key, or NULL if @keyval is not a valid key. The string should not be modified. Converts a key name to a key value. @keyval_name: a key name. @Returns: the corresponding key value, or %GDK_VoidSymbol if the key name is not a valid key. @symbol: @lower: @upper: Converts a key value to upper case, if applicable. @keyval: a key value. @Returns: the upper case form of @keyval, or @keyval itself if it is already in upper case or it is not subject to case conversion. Converts a key value to lower case, if applicable. @keyval: a key value. @Returns: the lower case form of @keyval, or @keyval itself if it is already in lower case or it is not subject to case conversion. Returns TRUE if the given key value is in upper case. @keyval: a key value. @Returns: TRUE if @keyval is in upper case, or if @keyval is not subject to case conversion. Returns TRUE if the given key value is in lower case. @keyval: a key value. @Returns: TRUE if @keyval is in lower case, or if @keyval is not subject to case conversion. @keyval: @Returns: @wc: @Returns: