Own sorting func in KTabListBox

[Frank Werner]

Hi guys,

i want to implement an own function whitch sorts a row in KTabListBox,
because the sorting order is wrong when the data is a date coming from
QDate.toString().

This is a part from my actual project:

kccview.h:
----- snip ---------------------------------------
class KccView : public KTabListBox
{
	Q_OBJECT

	public:
		KccView(KApplication* a=0,QWidget *parent = 0);
		~KccView();

	public slots:
		void slotViewUpdate(void);
		
	private:
		int cmpDate(char *, char *);

};
----- snip ---------------------------------------

kccview.cpp:
----- snip ---------------------------------------
KccView::KccView(KApplication* a,QWidget *parent):KTabListBox(parent)
{
	setNumCols( 4 );

	setSeparator('\t');

	setColumn( 0,  i18n("Type"), 100, TextColumn, SimpleOrder);
	setColumn( 1,  i18n("Line"), 100, TextColumn, SimpleOrder);
	setColumn( 2,  i18n("Sender"), 100, TextColumn, SimpleOrder);
	setColumn( 3,  i18n("Date"), 100, TextColumn, SimpleOrder, \
					Descending, false, cmpDate); 

	changeMode(3);
}
----- snip ---------------------------------------

The compiler/linker acts with the following message:
ccview.cpp:18: no matching function for call to `KccView::setColumn (int, const char *, int, KTabListBox::ColumnType, KTabListBox::OrderType, KTabListBox::OrderMode, bool, int (KccView::)(char *, char *))'
/opt/kde/include/ktablistbox.h:273: candidates are: KTabListBox::setColumn(int, const char *, int, KTabListBox::ColumnType, KTabListBox::OrderType, KTabListBox::OrderMode, bool, int (*)(const char *, const char *))
make[1]: Leaving directory `/home/frank/projects/kcc/kcc'
make[1]: *** [kccview.o] Error 1

Whats wrong?

Thanks for any suggestions.

Frank