1. $?*="text" or $input(text,p)

2. mIRC Editor, File -> Font. I believe the background color is set in your Windows display options

3. Some DLL, search on mircscripts.org's DLL section for 'toolbar'

4. From 0-15:

16777215,0,8323072,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16515072,16711935,8355711,13816530

5. if (!$istok(%channels,$chan,44)) {