Error C141 with Variables beginning with '$'

Hello,

I am using BankSwitching with XdataPort. In the BankSwitching Assembly file exists a public variable called '?B_CURRENTBANK'. I would like to access this variable from my C-program:

extern char ?B_CURRENTBANK;

void main(void)
{
char ucTest;
ucTest = ?B_CURRENTBANK;
}


The compiler gives me the following Error:
error C141: syntax error near '?'
.

Could somebody help me?

Thanks