protected virtual bool PreProcessWmKeyDown_Home(ref Message m)
{
long pos = _hexBox._bytePos;
int cp = _hexBox._byteCharacterPos;
if(pos < 1)
return true;
pos = 0;
cp = 0;
_hexBox.SetPosition(pos, cp);
_hexBox.ScrollByteIntoView();
_hexBox.UpdateCaret();
_hexBox.ReleaseSelection();
return true;
}