mysql connection

Question

i have 2 pc, a pc and b pc, a pc have mysql database,b pc have a program, the program connection mysql databaso on the a computer.

cnn=new MySql.Data.MySqlClient.MySqlConnection("Network Address="+ this.textBox2.Text +";Database="+ this.textBox3.Text +";User Name='"+ this.textBox4.Text +"';Password='" + this.textBox5.Text + "'");

mysql ip number on the localhost 127.0.0.1 and this pc ip number 192.168.1.5
network address=?
which ip number can i use?
what can i do?