'\"
'\" Copyright (c) 1997 Maorong Zou
'\" 
.TH EZ_SetWidgetCallBack 3 "" EZWGL "EZWGL Functions"
.BS
.SH NAME
EZ_SetWidgetCallBack  \- register a callback to a widget

.SH SYNOPSIS
.nf
.B #include <EZ.h>
.sp
.BI "void  EZ_SetWidgetCallBack( EZ_Widget *" widget ", 
.BI "                   EZ_CallBack "callback ", void *" data)

.SH ARGUMENTS
\fIwidget\fR  Specifies an EZ Widget.
.sp
\fIcallback\fR  Specifies a callback procedure.
.sp
\fIdata\fR  Specifies a clientdata to be passed to \fIcallback\fR when
invoked.
.SH DESCRIPTION
.PP
\fBEZ_SetWidgetCallBack\fR registered a unique callback to a
widget. This function removes all callbacks previousely registered
to \fIwidget\fR. Use \fBEZ_AddWidgetCallBack\fR instead if there
are multiple callbacks.

.SH "SEE ALSO"
 EZ_AddWidgetCallBack(3), EZ_AddEventHandler(3)
.br