Combo Box Problem + Questions on 0x0E + Opinions

[BaDDBLooD]

I have a combo box instead of a text box for sending text to battle.net.  Whenever i hit enter i add a item to the text box.  I have a few problems, they are as follows:

1) I Can't Copy and paste Large ammounts into the combo box, why?
2) What is the maximum amount of characters you can send to battle.net using 0x0E without being disconnected
3) I want to make it so if i send more than a the maximum allotted before ipban, it splits it up and sends it in chunks, any ideas?
4) When the Combo box get's to full, clear some out, how often should i do this?
5) Do you think sometype of check so you don't send text at too fast a rate, is a good idea?

Thanks for your Opinions/Help!

[UserLoser.]

I have a combo box instead of a text box for sending text to battle.net.  Whenever i hit enter i add a item to the text box.  I have a few problems, they are as follows:

1) I Can't Copy and paste Large ammounts into the combo box, why?
2) What is the maximum amount of characters you can send to battle.net using 0x0E without being disconnected
3) I want to make it so if i send more than a the maximum allotted before ipban, it splits it up and sends it in chunks, any ideas?
4) When the Combo box get's to full, clear some out, how often should i do this?
5) Do you think sometype of check so you don't send text at too fast a rate, is a good idea?

Thanks for your Opinions/Help!

1) Limit should be around 0x7FFFFFFE in size, look into setting the value via CB_LIMITTEXT.
2) Four hundred something
3) Yes
4) Whenever you feel like it's too full
5) Yes