Copying text of MSGBOX

Using the MSGBOX command;

msgbox ok "Copy To Clipboard" Press CTRL-C
I can copy the msgbox text to the Clipboard using the keyboard combination of CTRL-C, which gives me;

>type clip:
Copy To Clipboard
Press CTRL-C
In PowerBASIC and Visual Basic apps that I develop, I can use the CTRL-C and CTRL-INS keyboard combinations to copy the msgbox text to the Clipboard.

In TCMD 12 and 13, both in tabbed and non-tabbed TCC windows, the CTRL-INS does not work. I am using XP SP3.

Why does the CTRL-INS keyboard combination work in other apps, but not in TCMD/TCC?