how to pass string array when open a new window?

Try to pass a string array when open a new window in powerbuilder with following code:

string myparam[]

myparam[0] = '0'

myparam[1] = '1'

OPenWithParm(w_1, myparam,w_myframe)

then I get Error:

Bad argment list for function openwithparm

how to resolve this problem?