#define chkbox_width 16
#define chkbox_height 16
// static unsigned char chkbox_bits[] = {
static char chkbox_bits[] = {
   0x00, 0x80, 0xfe, 0x6f, 0x02, 0x30, 0x02, 0x58, 0x02, 0x4c, 0x02, 0x46,
   0x1a, 0x47, 0xbc, 0x43, 0xfe, 0x43, 0xfc, 0x41, 0xfa, 0x41, 0xf2, 0x40,
   0xe2, 0x40, 0x42, 0x40, 0xbe, 0x7f, 0x00, 0x00};