the value of x4 variable only changes when you click the button1 on form4.
For that reason the value is 0 not 67.
You need to call a function from form4.
A methd like this maybe:
public partial class Form4 : Form
{
public int x4=0;
public void SetIntValue()
{
x4 = 67;
}
}
and in the other from just call this method as:
frm4 = new Form4();
frm4.SetIntValue();
DrawText(frm4.x4);