Powerbuilder Find function populates "Expression not Valid"

Hi,

I am using find function in my program which is populsting expression not valid.

The data which the application trying to find has the characters " and '.

The expression used in the programs is as follows.

dw_1.setfilter("bno like '%" + ls_value + "%'")

The "ls_value" variable has values [This is 'Yes' or "No"] both characters ' & " is present in the data. Please let me know how to rewrite the expression sothat I can avoide the error message.

Any help is appreciated.

Thanks & Regards

Babin  A B