Hi
1. "clicked" callback:
void user_function( GtkButton *button, gpointer user_data );
for yor example:
void user_function( GtkButton *button, struct args *p );
2. You can't pass local variables:
> struct args *p = g_malloc( sizeof( *p ) );
> p->numdice = 1;
> p->sides = 10;
...
> g_signal_connect( G_OBJECT( button1 ), "clicked",
> G_CALLBACK( roll ), (gpointer) p );
Don't forget to free the allocated data, when the program is finished e.g.
via
g_signal_connect_swapped( G_OBJECT( button1 ), "destroy-event",
G_CALLBACK( g_free ), (gpointer) p );
HTH
Jan-Marek
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